Document Search Results

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item">so:</span><span>  </span>source</a></li> <li><a href="#"><span class="token item">sw:</span><span>  </span>software name</a></li> <li><a href="#"><span class="token item">ti:</span><span>  </span>title</a></li> <li><a href="#"><span class="token item">ut:</span><span>  </span>keyword</a></li> </ul> </div> <div class="btn-group operators"> <button class="btn btn-default dropdown-toggle" data-toggle="dropdown">Operators <i class="caret"></i></button> <ul id="operators" class="dropdown-menu pull-right"> <li><a href="#"><span class="token">a <span class="item">&</span> b </span><span> </span>logical and (default)</a></li> <li><a href="#"><span class="token">a <span class="item">|</span> b </span><span> </span>logical or</a></li> <li><a href="#"><span class="token"><span class="item">!</span>ab   </span><span> </span>logical not</a></li> <li><a href="#"><span class="token">abc<span class="item">*</span>  </span><span> </span>right wildcard</a></li> <li><a href="#"><span class="token"><span class="item">"</span>ab c<span class="item">"</span></span><span> </span>phrase</a></li> <li><a href="#"><span class="token"><span class="item">(</span>ab c<span class="item">)</span></span><span> </span>parentheses</a></li> </ul> </div> </div> </div> <div class="special"> <ul class="nav help-button"> <li class="dropdown pull-right"> <a href="#">Help <i class="caret"></i></a> </li> </ul> </div> </span> </div> <div class="help"><h2>Examples</h2> <div id="help-terms" role="table"> <div class="help-item" role="row"> <span class="search-example" role="rowheader"><a href="/?q=Geometry">Geometry</a></span> <span class="search-explanation" role="cell" role="cell">Search for the term <em>Geometry</em> in <strong>any</strong> field. 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<a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/7984137"><strong>On the criteria of a measure of non-strict cosingularity in the description of spectral properties of operator matrix.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7984137">Zbl 07984137</a> </h3> <div class="source"> <a href="/serials/2024" title="Journal Profile">Georgian Math. J.</a> <a href="/?q=in%3A523822" title="Articles in this Issue">32, No. 1, 37-50 (2025)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A56" title="Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones)">47A56</a> <a class="mono" href="/classification/?q=cc%3A47A13" title="Several-variable operator theory (spectral, Fredholm, etc.)">47A13</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07984137" data-ciurl="/ci/07984137" data-biburl="/bibtex/07984137.bib" data-amsurl="/amsrefs/07984137.bib" data-xmlurl="/xml/07984137.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07984137.pdf" title="Zbl 07984137 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1515/gmj-2024-2029" aria-label="DOI for “On the criteria of a measure of non-strict cosingularity in the description of spectral properties of operator matrix”" title="10.1515/gmj-2024-2029">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7944285" value="7944285" aria-label="mark item Zbl 07944285"></div> <div class="author"><a href="/authors/bouida.naila" title="Author Profile">Bouida, Naila</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/7944285"><strong>On the measure of non strict cosingularity and the theory of operator matrix.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7944285">Zbl 07944285</a> </h3> <div class="source"> <a href="/serials/2594" title="Journal Profile">Commun. Korean Math. Soc.</a> <a href="/?q=in%3A520564" title="Articles in this Issue">39, No. 4, 875-895 (2024)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A56" title="Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones)">47A56</a> <a class="mono" href="/classification/?q=cc%3A47A13" title="Several-variable operator theory (spectral, Fredholm, etc.)">47A13</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07944285" data-ciurl="/ci/07944285" data-biburl="/bibtex/07944285.bib" data-amsurl="/amsrefs/07944285.bib" data-xmlurl="/xml/07944285.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07944285.pdf" title="Zbl 07944285 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.4134/CKMS.c230344" aria-label="DOI for “On the measure of non strict cosingularity and the theory of operator matrix”" title="10.4134/CKMS.c230344">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7829228" value="7829228" aria-label="mark item Zbl 1537.39015"></div> <div class="author"><a href="/authors/marzouk.ines" title="Author Profile">Marzouk, Ines</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1537.39015"><strong>New approach on the study of operator matrix.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1537.39015">Zbl 1537.39015</a> </h3> <div class="source"> <a href="/serials/2024" title="Journal Profile">Georgian Math. J.</a> <a href="/?q=in%3A510808" title="Articles in this Issue">31, No. 2, 315-330 (2024)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A39B42" title="Matrix and operator functional equations">39B42</a> <a class="mono" href="/classification/?q=cc%3A15A09" title="Theory of matrix inversion and generalized inverses">15A09</a> <a class="mono" href="/classification/?q=cc%3A47A56" title="Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones)">47A56</a> <a class="mono" href="/classification/?q=cc%3A47A13" title="Several-variable operator theory (spectral, Fredholm, etc.)">47A13</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A34K08" title="Spectral theory of functional-differential operators">34K08</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> <a class="mono" href="/classification/?q=cc%3A45J05" title="Integro-ordinary differential equations">45J05</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1537.39015" data-ciurl="/ci/07829228" data-biburl="/bibtex/07829228.bib" data-amsurl="/amsrefs/07829228.bib" data-xmlurl="/xml/07829228.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07829228.pdf" title="Zbl 1537.39015 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1515/gmj-2023-2071" aria-label="DOI for “New approach on the study of operator matrix”" title="10.1515/gmj-2023-2071">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7813040" value="7813040" aria-label="mark item Zbl 07813040"></div> <div class="author"><a href="/authors/abdmouleh.faical" title="Author Profile">Abdmouleh, Faiçal</a>; <a href="/authors/bahloul.aymen" title="Author Profile">Bahloul, Aymen</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/7813040"><strong>B-essential spectra of operators matrix block $3\times 3$ applied to a radiative transfer equations in a channel.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7813040">Zbl 07813040</a> </h3> <div class="source"> <a href="/serials/2084" title="Journal Profile">Bull. Sci. Math.</a> <a href="/?q=in%3A509447" title="Articles in this Issue">191, Article ID 103400, 30 p. (2024)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A08" title="Operator matrices">47A08</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A85A25" title="Radiative transfer in astronomy and astrophysics">85A25</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07813040" data-ciurl="/ci/07813040" data-biburl="/bibtex/07813040.bib" data-amsurl="/amsrefs/07813040.bib" data-xmlurl="/xml/07813040.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07813040.pdf" title="Zbl 07813040 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1016/j.bulsci.2024.103400" aria-label="DOI for “B-essential spectra of operators matrix block $3\times 3$ applied to a radiative transfer equations in a channel”" title="10.1016/j.bulsci.2024.103400">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7798731" value="7798731" aria-label="mark item Zbl 07798731"></div> <div class="author"><a href="/authors/abdmouleh.faical" title="Author Profile">Abdmouleh, Faiçal</a>; <a href="/authors/chaaben.hamadi" title="Author Profile">Chaâben, Hamadi</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/7798731"><strong>Characterization of essential spectra by quasi-compact perturbations.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7798731">Zbl 07798731</a> </h3> <div class="source"> <a href="/serials/681" title="Journal Profile">Rev. Unión Mat. Argent.</a> <a href="/?q=in%3A507941" title="Articles in this Issue">65, No. 2, 229-244 (2023)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A13" title="Several-variable operator theory (spectral, Fredholm, etc.)">47A13</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07798731" data-ciurl="/ci/07798731" data-biburl="/bibtex/07798731.bib" data-amsurl="/amsrefs/07798731.bib" data-xmlurl="/xml/07798731.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07798731.pdf" title="Zbl 07798731 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.33044/revuma.2771" aria-label="DOI for “Characterization of essential spectra by quasi-compact perturbations”" title="10.33044/revuma.2771">DOI</a> </div> <div class="sfx" style="float: right;"> <a href="https://creativecommons.org/licenses/by/4.0/" target="_blank" title="Open Access License" class="cc-license-link no-new-tab-icon"> <img src="https://static.zbmath.org/contrib/img/cc/svg/icons/cc.svg" alt="Creative Commons CC license icon" class="cc-license-icon"> <img src="https://static.zbmath.org/contrib/img/cc/svg/icons/by.svg" alt="Creative Commons BY license icon" class="cc-license-icon"> </a> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7772818" value="7772818" aria-label="mark item Zbl 1539.47022"></div> <div class="author"><a href="/authors/abdmouleh.faical" title="Author Profile">Abdmouleh, Faiçal</a>; <a href="/authors/khlif.hassen" title="Author Profile">Khlif, Hassen</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1539.47022"><strong>On left and right Browder elements in Banach algebra relative to a bounded homomorphism.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1539.47022">Zbl 1539.47022</a> </h3> <div class="source"> <a href="/serials/2024" title="Journal Profile">Georgian Math. J.</a> <a href="/?q=in%3A505530" title="Articles in this Issue">30, No. 6, 803-810 (2023)</a>. </div> <div class="reviewer"> Reviewer: <a href="/authors/?q=rv%3A7509">Andrzej Sołtysiak (Poznań)</a></div> <div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> <a class="mono" href="/classification/?q=cc%3A46H05" title="General theory of topological algebras">46H05</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1539.47022" data-ciurl="/ci/07772818" data-biburl="/bibtex/07772818.bib" data-amsurl="/amsrefs/07772818.bib" data-xmlurl="/xml/07772818.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07772818.pdf" title="Zbl 1539.47022 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1515/gmj-2023-2040" aria-label="DOI for “On left and right Browder elements in Banach algebra relative to a bounded homomorphism”" title="10.1515/gmj-2023-2040">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7757164" value="7757164" aria-label="mark item Zbl 07757164"></div> <div class="author"><a href="/authors/bouzidi.sana" title="Author Profile">Bouzidi, Sana</a>; <a href="/authors/moalla.nedra" title="Author Profile">Moalla, Nedra</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/7757164"><strong>On the analysis of some perturbed Browder’s operators.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7757164">Zbl 07757164</a> </h3> <div class="source"> <a href="/serials/4857" title="Journal Profile">Ann. Univ. Ferrara, Sez. VII, Sci. Mat.</a> <a href="/?q=in%3A503754" title="Articles in this Issue">69, No. 2, 401-420 (2023)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A34K08" title="Spectral theory of functional-differential operators">34K08</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07757164" data-ciurl="/ci/07757164" data-biburl="/bibtex/07757164.bib" data-amsurl="/amsrefs/07757164.bib" data-xmlurl="/xml/07757164.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07757164.pdf" title="Zbl 07757164 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1007/s11565-022-00439-0" aria-label="DOI for “On the analysis of some perturbed Browder's operators”" title="10.1007/s11565-022-00439-0">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7674264" value="7674264" aria-label="mark item Zbl 1523.47008"></div> <div class="author"><a href="/authors/abdmouleh.faical" title="Author Profile">Abdmouleh, Faiçal</a>; <a href="/authors/bahloul.aymen" title="Author Profile">Bahloul, Aymen</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1523.47008"><strong>B-essential spectra of $2 \times 2$ block operator matrix pencils.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1523.47008">Zbl 1523.47008</a> </h3> <div class="source"> <a href="/serials/2024" title="Journal Profile">Georgian Math. J.</a> <a href="/?q=in%3A495496" title="Articles in this Issue">30, No. 2, 161-172 (2023)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A08" title="Operator matrices">47A08</a> <a class="mono" href="/classification/?q=cc%3A47A56" title="Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones)">47A56</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A47N20" title="Applications of operator theory to differential and integral equations">47N20</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1523.47008" data-ciurl="/ci/07674264" data-biburl="/bibtex/07674264.bib" data-amsurl="/amsrefs/07674264.bib" data-xmlurl="/xml/07674264.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07674264.pdf" title="Zbl 1523.47008 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1515/gmj-2022-2210" aria-label="DOI for “B-essential spectra of $2 \times 2$ block operator matrix pencils”" title="10.1515/gmj-2022-2210">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7648465" value="7648465" aria-label="mark item Zbl 07648465"></div> <div class="author"><a href="/authors/zivkovic-zlatanovic.snezana-c" title="Author Profile">Živković-Zlatanović, Snežana Č.</a>; <a href="/authors/chaaben.hamadi" title="Author Profile">Chaâben, Hamadi</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a>; <a href="/authors/abdmouleh.faical" title="Author Profile">Abdmouleh, Faiçal</a></div> <h3 class="title"> <a href="/7648465"><strong>A note on essential spectra of linear operator pencils.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7648465">Zbl 07648465</a> </h3> <div class="source"> <a href="/serials/1005" title="Journal Profile">Bull. Iran. Math. Soc.</a> <a href="/?q=in%3A492071" title="Articles in this Issue">48, No. 6, 3439-3456 (2022)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A13" title="Several-variable operator theory (spectral, Fredholm, etc.)">47A13</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07648465" data-ciurl="/ci/07648465" data-biburl="/bibtex/07648465.bib" data-amsurl="/amsrefs/07648465.bib" data-xmlurl="/xml/07648465.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07648465.pdf" title="Zbl 07648465 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1007/s41980-022-00703-1" aria-label="DOI for “A note on essential spectra of linear operator pencils”" title="10.1007/s41980-022-00703-1">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7618159" value="7618159" aria-label="mark item Zbl 07618159"></div> <div class="author"><a href="/authors/bahloul.aymen" title="Author Profile">Bahloul, Aymen</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/7618159"><strong>Generalized Drazin invertibility of operator matrices.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7618159">Zbl 07618159</a> </h3> <div class="source"> <a href="/serials/609" title="Journal Profile">Numer. Funct. Anal. Optim.</a> <a href="/?q=in%3A489934" title="Articles in this Issue">43, No. 16, 1836-1847 (2022)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A11" title="Local spectral properties of linear operators">47A11</a> <a class="mono" href="/classification/?q=cc%3A47B01" title="Operators on Banach spaces">47B01</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07618159" data-ciurl="/ci/07618159" data-biburl="/bibtex/07618159.bib" data-amsurl="/amsrefs/07618159.bib" data-xmlurl="/xml/07618159.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07618159.pdf" title="Zbl 07618159 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1080/01630563.2022.2137811" aria-label="DOI for “Generalized Drazin invertibility of operator matrices”" title="10.1080/01630563.2022.2137811">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7574053" value="7574053" aria-label="mark item Zbl 1500.47019"></div> <div class="author"><a href="/authors/bouzidi.sana" title="Author Profile">Bouzidi, Sana</a>; <a href="/authors/moalla.nedra" title="Author Profile">Moalla, Nedra</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1500.47019"><strong>Spectral analysis of perturbed Fredholm operators.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1500.47019">Zbl 1500.47019</a> </h3> <div class="source"> <a href="/serials/4912" title="Journal Profile">Complex Anal. Oper. Theory</a> <a href="/?q=in%3A484494" title="Articles in this Issue">16, No. 6, Paper No. 87, 27 p. (2022)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A34K08" title="Spectral theory of functional-differential operators">34K08</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1500.47019" data-ciurl="/ci/07574053" data-biburl="/bibtex/07574053.bib" data-amsurl="/amsrefs/07574053.bib" data-xmlurl="/xml/07574053.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07574053.pdf" title="Zbl 1500.47019 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1007/s11785-022-01267-y" aria-label="DOI for “Spectral analysis of perturbed Fredholm operators”" title="10.1007/s11785-022-01267-y">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7536921" value="7536921" aria-label="mark item Zbl 07536921"></div> <div class="author"><a href="/authors/abdmouleh.faical" title="Author Profile">Abdmouleh, Faiçal</a>; <a href="/authors/khlif.hassen" title="Author Profile">Khlif, Hassen</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/7536921"><strong>Spectral description of Fredholm operators via polynomially Riesz operators perturbation.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7536921">Zbl 07536921</a> </h3> <div class="source"> <a href="/serials/2024" title="Journal Profile">Georgian Math. J.</a> <a href="/?q=in%3A482759" title="Articles in this Issue">29, No. 3, 317-333 (2022)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47B06" title="Riesz operators; eigenvalue distributions; approximation numbers, $s$-numbers, Kolmogorov numbers, entropy numbers, etc. of operators">47B06</a> <a class="mono" href="/classification/?q=cc%3A47D03" title="Groups and semigroups of linear operators">47D03</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A34K08" title="Spectral theory of functional-differential operators">34K08</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07536921" data-ciurl="/ci/07536921" data-biburl="/bibtex/07536921.bib" data-amsurl="/amsrefs/07536921.bib" data-xmlurl="/xml/07536921.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07536921.pdf" title="Zbl 07536921 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1515/gmj-2021-2138" aria-label="DOI for “Spectral description of Fredholm operators via polynomially Riesz operators perturbation”" title="10.1515/gmj-2021-2138">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7361677" value="7361677" aria-label="mark item Zbl 1542.47010"></div> <div class="author"><a href="/authors/bouzidi.sana" title="Author Profile">Bouzidi, Sana</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1542.47010"><strong>Left-right essential spectra of one-sided operator matrix and application.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1542.47010">Zbl 1542.47010</a> </h3> <div class="source"> Jeribi, Aref (ed.), Operator theory. Proceedings of the international conference on operator theory, Hammamet, Tunisia, April 30 – May 3, 2018. Berlin: De Gruyter. De Gruyter Proc. Math., 157-175 (2021). </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A08" title="Operator matrices">47A08</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A34K08" title="Spectral theory of functional-differential operators">34K08</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1542.47010" data-ciurl="/ci/07361677" data-biburl="/bibtex/07361677.bib" data-amsurl="/amsrefs/07361677.bib" data-xmlurl="/xml/07361677.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07361677.pdf" title="Zbl 1542.47010 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1515/9783110598193-012" aria-label="DOI for “Left-right essential spectra of one-sided operator matrix and application”" title="10.1515/9783110598193-012">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7167244" value="7167244" aria-label="mark item Zbl 1498.47012"></div> <div class="author"><a href="/authors/charfi.salma" title="Author Profile">Charfi, Salma</a>; <a href="/authors/elleuch.asrar" title="Author Profile">Elleuch, Asrar</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1498.47012"><strong>Spectral theory involving the concept of quasi-compact perturbations.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1498.47012">Zbl 1498.47012</a> </h3> <div class="source"> <a href="/serials/3164" title="Journal Profile">Mediterr. J. Math.</a> <a href="/?q=in%3A446379" title="Articles in this Issue">17, No. 1, Paper No. 32, 16 p. (2020)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A13" title="Several-variable operator theory (spectral, Fredholm, etc.)">47A13</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1498.47012" data-ciurl="/ci/07167244" data-biburl="/bibtex/07167244.bib" data-amsurl="/amsrefs/07167244.bib" data-xmlurl="/xml/07167244.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07167244.pdf" title="Zbl 1498.47012 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1007/s00009-019-1468-x" aria-label="DOI for “Spectral theory involving the concept of quasi-compact perturbations”" title="10.1007/s00009-019-1468-x">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7093984" value="7093984" aria-label="mark item Zbl 1448.47009"></div> <div class="author"><a href="/authors/belghith.marwa" title="Author Profile">Belghith, Marwa</a>; <a href="/authors/moalla.nedra" title="Author Profile">Moalla, Nedra</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1448.47009"><strong>On the essential spectra of unbounded operator matrices with non diagonal domain and an application.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1448.47009">Zbl 1448.47009</a> </h3> <div class="source"> <a href="/serials/5005" title="Journal Profile">Oper. Matrices</a> <a href="/?q=in%3A432455" title="Articles in this Issue">13, No. 1, 231-251 (2019)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A08" title="Operator matrices">47A08</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A34K08" title="Spectral theory of functional-differential operators">34K08</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1448.47009" data-ciurl="/ci/07093984" data-biburl="/bibtex/07093984.bib" data-amsurl="/amsrefs/07093984.bib" data-xmlurl="/xml/07093984.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07093984.pdf" title="Zbl 1448.47009 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.7153/oam-2019-13-16" aria-label="DOI for “On the essential spectra of unbounded operator matrices with non diagonal domain and an application”" title="10.7153/oam-2019-13-16">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7077403" value="7077403" aria-label="mark item Zbl 1456.34068"></div> <div class="author"><a href="/authors/intissar.abdelkader" title="Author Profile">Intissar, Abdelkader</a>; <a href="/authors/jeribi.aref" title="Author Profile">Jeribi, Aref</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1456.34068"><strong>Riesz basis of exponential family for a hyperbolic system.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1456.34068">Zbl 1456.34068</a> </h3> <div class="source"> <a href="/serials/2262" title="Journal Profile">J. Appl. Anal.</a> <a href="/?q=in%3A435249" title="Articles in this Issue">25, No. 1, 13-23 (2019)</a>. </div> <div class="reviewer"> Reviewer: <a href="/authors/?q=rv%3A10283">Minh Van Nguyen (Little Rock)</a></div> <div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A34G10" title="Linear differential equations in abstract spaces">34G10</a> <a class="mono" href="/classification/?q=cc%3A34L15" title="Eigenvalues, estimation of eigenvalues, upper and lower bounds of ordinary differential operators">34L15</a> <a class="mono" href="/classification/?q=cc%3A34L10" title="Eigenfunctions, eigenfunction expansions, completeness of eigenfunctions of ordinary differential operators">34L10</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1456.34068" data-ciurl="/ci/07077403" data-biburl="/bibtex/07077403.bib" data-amsurl="/amsrefs/07077403.bib" data-xmlurl="/xml/07077403.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07077403.pdf" title="Zbl 1456.34068 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1515/jaa-2019-0002" aria-label="DOI for “Riesz basis of exponential family for a hyperbolic system”" title="10.1515/jaa-2019-0002">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item7006335" value="7006335" aria-label="mark item Zbl 07006335"></div> <div class="author"><a href="/authors/abdmouleh.faical" title="Author Profile">Abdmouleh, Faiçal</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/7006335"><strong>Measure of non strict singularity of Schechter essential spectrum of two bounded operators and application.</strong></a> <i>(English)</i> <a class="label nowrap" href="/7006335">Zbl 07006335</a> </h3> <div class="source"> <a href="/serials/1005" title="Journal Profile">Bull. Iran. Math. Soc.</a> <a href="/?q=in%3A426764" title="Articles in this Issue">43, No. 5, 1543-1558 (2017)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A34K08" title="Spectral theory of functional-differential operators">34K08</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 07006335" data-ciurl="/ci/07006335" data-biburl="/bibtex/07006335.bib" data-amsurl="/amsrefs/07006335.bib" data-xmlurl="/xml/07006335.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/07006335.pdf" title="Zbl 07006335 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="http://bims.iranjournals.ir/article_1050.html" title="Full Text Link">Link</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item6836389" value="6836389" aria-label="mark item Zbl 06836389"></div> <div class="author"><a href="/authors/belghith.marwa" title="Author Profile">Belghith, Marwa</a>; <a href="/authors/moalla.nedra" title="Author Profile">Moalla, Nedra</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/6836389"><strong>On the essential spectra of coupled operators matrix and application.</strong></a> <i>(English)</i> <a class="label nowrap" href="/6836389">Zbl 06836389</a> </h3> <div class="source"> <a href="/serials/154" title="Journal Profile">Math. Methods Appl. Sci.</a> <a href="/?q=in%3A373088" title="Articles in this Issue">40, No. 18, 7218-7230 (2017)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 06836389" data-ciurl="/ci/06836389" data-biburl="/bibtex/06836389.bib" data-amsurl="/amsrefs/06836389.bib" data-xmlurl="/xml/06836389.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/06836389.pdf" title="Zbl 06836389 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1002/mma.4524" aria-label="DOI for “On the essential spectra of coupled operators matrix and application”" title="10.1002/mma.4524">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item6806712" value="6806712" aria-label="mark item Zbl 1508.47005"></div> <div class="author"><a href="/authors/moalla.nedra" title="Author Profile">Moalla, Nedra</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1508.47005"><strong>Stability of Schechter essential spectrum of $2 \times 2$ block operator matrix by means of measure of non strict singularity and application.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1508.47005">Zbl 1508.47005</a> </h3> <div class="source"> <a href="/serials/1763" title="Journal Profile">Indag. Math., New Ser.</a> <a href="/?q=in%3A371775" title="Articles in this Issue">28, No. 6, 1275-1287 (2017)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A08" title="Operator matrices">47A08</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1508.47005" data-ciurl="/ci/06806712" data-biburl="/bibtex/06806712.bib" data-amsurl="/amsrefs/06806712.bib" data-xmlurl="/xml/06806712.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/06806712.pdf" title="Zbl 1508.47005 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1016/j.indag.2017.09.010" aria-label="DOI for “Stability of Schechter essential spectrum of $2 \times 2$ block operator matrix by means of measure of non strict singularity and application”" title="10.1016/j.indag.2017.09.010">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item6594395" value="6594395" aria-label="mark item Zbl 1347.47003"></div> <div class="author"><a href="/authors/charfi.salma" title="Author Profile">Charfi, Salma</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1347.47003"><strong>On relative essential spectra of block operator matrices and application.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1347.47003">Zbl 1347.47003</a> </h3> <div class="source"> <a href="/serials/909" title="Journal Profile">Bull. Korean Math. Soc.</a> <a href="/?q=in%3A356048" title="Articles in this Issue">53, No. 3, 681-698 (2016)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A34K08" title="Spectral theory of functional-differential operators">34K08</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1347.47003" data-ciurl="/ci/06594395" data-biburl="/bibtex/06594395.bib" data-amsurl="/amsrefs/06594395.bib" data-xmlurl="/xml/06594395.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/06594395.pdf" title="Zbl 1347.47003 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.4134/BKMS.b150233" aria-label="DOI for “On relative essential spectra of block operator matrices and application”" title="10.4134/BKMS.b150233">DOI</a> <a class="btn btn-default btn-xs" type="button" href="http://www.mathnet.or.kr/mathnet/kms_content.php?no=467759" title="Full Text Link">Link</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item6433300" value="6433300" aria-label="mark item Zbl 1317.47004"></div> <div class="author"><a href="/authors/abdmouleh.faical" title="Author Profile">Abdmouleh, Faiçal</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1317.47004"><strong>Characterization and stability of the essential spectrum based on measures of polynomially non-strict singularity operators.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1317.47004">Zbl 1317.47004</a> </h3> <div class="source"> <a href="/serials/1763" title="Journal Profile">Indag. Math., New Ser.</a> <a href="/?q=in%3A343831" title="Articles in this Issue">26, No. 3, 455-467 (2015)</a>. </div> <div class="reviewer"> Reviewer: <a href="/authors/?q=rv%3A3547">Vladimir S. Pilidi (Rostov-na-Donu)</a></div> <div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1317.47004" data-ciurl="/ci/06433300" data-biburl="/bibtex/06433300.bib" data-amsurl="/amsrefs/06433300.bib" data-xmlurl="/xml/06433300.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/06433300.pdf" title="Zbl 1317.47004 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1016/j.indag.2015.01.005" aria-label="DOI for “Characterization and stability of the essential spectrum based on measures of polynomially non-strict singularity operators”" title="10.1016/j.indag.2015.01.005">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item6353370" value="6353370" aria-label="mark item Zbl 1524.47019"></div> <div class="author"><a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1524.47019"><strong>On the M-essential spectra of two-group transport equations.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1524.47019">Zbl 1524.47019</a> </h3> <div class="source"> <a href="/serials/154" title="Journal Profile">Math. Methods Appl. Sci.</a> <a href="/?q=in%3A335900" title="Articles in this Issue">37, No. 14, 2135-2149 (2014)</a>. </div><div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A56" title="Functions whose values are linear operators (operator- and matrix-valued functions, etc., including analytic and meromorphic ones)">47A56</a> <a class="mono" href="/classification/?q=cc%3A47A08" title="Operator matrices">47A08</a> <a class="mono" href="/classification/?q=cc%3A47B01" title="Operators on Banach spaces">47B01</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A47A55" title="Perturbation theory of linear operators">47A55</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1524.47019" data-ciurl="/ci/06353370" data-biburl="/bibtex/06353370.bib" data-amsurl="/amsrefs/06353370.bib" data-xmlurl="/xml/06353370.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/06353370.pdf" title="Zbl 1524.47019 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1002/mma.2961" aria-label="DOI for “On the M-essential spectra of two-group transport equations”" title="10.1002/mma.2961">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item5924025" value="5924025" aria-label="mark item Zbl 1225.47085"></div> <div class="author"><a href="/authors/charfi.salma" title="Author Profile">Charfi, Salma</a>; <a href="/authors/jeribi.aref" title="Author Profile">Jeribi, Aref</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1225.47085"><strong>Riesz basis property of families of nonharmonic exponentials and application to a problem of a radiation of a vibrating structure in a light fluid.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1225.47085">Zbl 1225.47085</a> </h3> <div class="source"> <a href="/serials/609" title="Journal Profile">Numer. Funct. Anal. Optim.</a> <a href="/?q=in%3A282210" title="Articles in this Issue">32, No. 4, 370-382 (2011)</a>. </div> <div class="reviewer"> Reviewer: <a href="/authors/?q=rv%3A11286">Smail Djebali (Algiers)</a></div> <div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47J10" title="Nonlinear spectral theory, nonlinear eigenvalue problems">47J10</a> <a class="mono" href="/classification/?q=cc%3A49R05" title="Variational methods for eigenvalues of operators">49R05</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A70" title="(Generalized) eigenfunction expansions of linear operators; rigged Hilbert spaces">47A70</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1225.47085" data-ciurl="/ci/05924025" data-biburl="/bibtex/05924025.bib" data-amsurl="/amsrefs/05924025.bib" data-xmlurl="/xml/05924025.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/05924025.pdf" title="Zbl 1225.47085 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1080/01630563.2011.555832" aria-label="DOI for “Riesz basis property of families of nonharmonic exponentials and application to a problem of a radiation of a vibrating structure in a light fluid”" title="10.1080/01630563.2011.555832">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item5849822" value="5849822" aria-label="mark item Zbl 1217.15013"></div> <div class="author"><a href="/authors/jeribi.aref" title="Author Profile">Jeribi, Aref</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1217.15013"><strong>Gustafson, Weidmann, Kato, Wolf, Schechter and Browder essential spectra of some matrix operator and application to two-group transport equation.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1217.15013">Zbl 1217.15013</a> </h3> <div class="source"> <a href="/serials/561" title="Journal Profile">Math. Nachr.</a> <a href="/?q=in%3A273505" title="Articles in this Issue">284, No. 1, 67-86 (2011)</a>. </div> <div class="reviewer"> Reviewer: <a href="/authors/?q=rv%3A10582">Jaspal Singh Aujla (Jalandhar)</a></div> <div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A15A18" title="Eigenvalues, singular values, and eigenvectors">15A18</a> <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1217.15013" data-ciurl="/ci/05849822" data-biburl="/bibtex/05849822.bib" data-amsurl="/amsrefs/05849822.bib" data-xmlurl="/xml/05849822.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/05849822.pdf" title="Zbl 1217.15013 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1002/mana.200710125" aria-label="DOI for “Gustafson, Weidmann, Kato, Wolf, Schechter and Browder essential spectra of some matrix operator and application to two-group transport equation”" title="10.1002/mana.200710125">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item5760433" value="5760433" aria-label="mark item Zbl 1209.47006"></div> <div class="author"><a href="/authors/charfi.salma" title="Author Profile">Charfi, Salma</a>; <a href="/authors/jeribi.aref" title="Author Profile">Jeribi, Aref</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1209.47006"><strong>Essential spectra, matrix operator and applications.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1209.47006">Zbl 1209.47006</a> </h3> <div class="source"> <a href="/serials/965" title="Journal Profile">Acta Appl. Math.</a> <a href="/?q=in%3A265283" title="Articles in this Issue">111, No. 3, 319-337 (2010)</a>. </div> <div class="reviewer"> Reviewer: <a href="/authors/?q=rv%3A13005">R. S. Ismagilov (Moscow)</a></div> <div class="classification"> MSC:  <a class="mono" href="/classification/?q=cc%3A47A10" title="Spectrum, resolvent">47A10</a> <a class="mono" href="/classification/?q=cc%3A47A53" title="(Semi-) Fredholm operators; index theories">47A53</a> <a class="mono" href="/classification/?q=cc%3A47N20" title="Applications of operator theory to differential and integral equations">47N20</a> <a class="mono" href="/classification/?q=cc%3A35P05" title="General topics in linear spectral theory for PDEs">35P05</a> </div>  <div class="modal fade" id="metadataModal" tabindex="-1" role="dialog" aria-labelledby="myModalLabel"> <div class="modal-dialog" role="document"> <div class="modal-content"> <div class="modal-header"> <button type="button" class="close" data-dismiss="modal" aria-label="Close"><span aria-hidden="true">×</span></button> <h4 class="modal-title" id="myModalLabel">Cite</h4> </div> <div class="modal-body"> <div class="form-group"> <label for="select-output" class="control-label">Format</label> <select id="select-output" class="form-control" aria-label="Select Metadata format"></select> </div> <div class="form-group"> <label for="metadataText" class="control-label">Result</label> <textarea class="form-control" id="metadataText" rows="10" style="min-width: 100%;max-width: 100%"></textarea> </div> <div id="metadata-alert" class="alert alert-danger" role="alert" style="display: none;">  </div> </div> <div class="modal-footer"> <button type="button" class="btn btn-primary" onclick="copyMetadata()">Copy to clipboard</button> <button type="button" class="btn btn-default" data-dismiss="modal">Close</button> </div> </div> </div> </div> <div class="functions clearfix"> <div class="function">  <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1209.47006" data-ciurl="/ci/05760433" data-biburl="/bibtex/05760433.bib" data-amsurl="/amsrefs/05760433.bib" data-xmlurl="/xml/05760433.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/05760433.pdf" title="Zbl 1209.47006 as PDF">Review PDF</a> </div> <div class="fulltexts"> <span class="fulltext">Full Text:</span> <a class="btn btn-default btn-xs" type="button" href="https://doi.org/10.1007/s10440-009-9547-9" aria-label="DOI for “Essential spectra, matrix operator and applications”" title="10.1007/s10440-009-9547-9">DOI</a> </div> <div class="sfx" style="float: right;"> </div> </div> </article> </div> <div class="list" role="listitem"> <article> <div class="mark-btn"><input type="checkbox" name="mark" id="item5492809" value="5492809" aria-label="mark item Zbl 1166.47007"></div> <div class="author"><a href="/authors/jeribi.aref" title="Author Profile">Jeribi, Aref</a>; <a href="/authors/moalla.nedra" title="Author Profile">Moalla, Nedra</a>; <a href="/authors/walha.ines" title="Author Profile">Walha, Ines</a></div> <h3 class="title"> <a href="/1166.47007"><strong>Spectra of some block operator matrices and application to transport operators.</strong></a> <i>(English)</i> <a class="label nowrap" href="/1166.47007">Zbl 1166.47007</a> </h3> <div class="source"> <a href="/serials/132" title="Journal Profile">J. Math. Anal. 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Matrices </a> (1)</li></ul> </div> <div class="filter filter-py"><a tabindex="0" class="more">all <i class="caret"></i></a> <a tabindex="0" class="less">top 5 <i class="caret"></i></a><h3 class="filter-caption">Year of Publication</h3> <ul><li> <a href="/?q=ia%3Awalha.ines+py%3A2025">2025</a> (1) </li><li> <a href="/?q=ia%3Awalha.ines+py%3A2024">2024</a> (3) </li><li> <a href="/?q=ia%3Awalha.ines+py%3A2023">2023</a> (4) </li><li> <a href="/?q=ia%3Awalha.ines+py%3A2022">2022</a> (4) </li><li> <a href="/?q=ia%3Awalha.ines+py%3A2021">2021</a> (1) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2020">2020</a> (1) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2019">2019</a> (2) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2017">2017</a> (3) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2016">2016</a> (1) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2015">2015</a> (1) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2014">2014</a> (1) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2011">2011</a> (2) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2010">2010</a> (1) </li><li class="more"> <a href="/?q=ia%3Awalha.ines+py%3A2009">2009</a> (1) </li> </ul> </div> <div class="filter filter-cc"><a tabindex="0" class="more">all <i class="caret"></i></a> <a tabindex="0" class="less">top 3 <i class="caret"></i></a><h3 class="filter-caption">Main Field</h3> <ul><li> <a class="" href="/?q=ia%3Awalha.ines+cc%3A47" title="Operator theory">47-XX </a> (25) </li><li> <a class="" href="/?q=ia%3Awalha.ines+cc%3A34" title="Ordinary differential equations">34-XX </a> (9) </li><li> <a class="" href="/?q=ia%3Awalha.ines+cc%3A15" title="Linear and multilinear algebra; matrix theory">15-XX </a> (2) </li><li class="more"> <a class="" href="/?q=ia%3Awalha.ines+cc%3A35" title="Partial differential equations">35-XX </a> (1) </li><li class="more"> <a class="" href="/?q=ia%3Awalha.ines+cc%3A39" title="Difference and functional equations">39-XX </a> (1) </li><li class="more"> <a class="" href="/?q=ia%3Awalha.ines+cc%3A45" title="Integral equations">45-XX </a> (1) </li><li class="more"> <a class="" href="/?q=ia%3Awalha.ines+cc%3A46" title="Functional analysis">46-XX </a> (1) </li><li class="more"> <a class="" href="/?q=ia%3Awalha.ines+cc%3A49" title="Calculus of variations and optimal control; optimization">49-XX </a> (1) </li><li class="more"> <a class="" href="/?q=ia%3Awalha.ines+cc%3A85" title="Astronomy and astrophysics">85-XX </a> (1) </li></ul> </div> </section> <div class="content-clear"></div> </div> </div> <div class="clearfix"></div> </div> </div> <div id="foot"><div class="copyright"> © 2025 <a target="fiz" href="https://www.fiz-karlsruhe.de/en">FIZ Karlsruhe GmbH</a> <a href="/privacy-policy/">Privacy Policy</a> <a href="/legal-notices/">Legal Notices</a> <a href="/terms-conditions/">Terms & Conditions</a> <div class="info"> <ul class="nav"> <li class="mastodon"> <a href="https://mathstodon.xyz/@zbMATH" target="_blank" class="no-new-tab-icon"> <img src="/static/mastodon.png" title="zbMATH at Mathstodon (opens in new tab)" alt="Mastodon logo"> </a> </li> </ul> </div> </div> <div class="clearfix" style="height: 0px;"></div> </div> </div> <script src="https://static.zbmath.org/contrib/jquery/1.9.1/jquery.min.js"></script> <script src="https://static.zbmath.org/contrib/jquery-caret/1.5.2/jquery.caret.min.js"></script> <script src="/static/js/jquery-ui-1.10.1.custom.min.js"></script> <script src="https://static.zbmath.org/contrib/bootstrap/v3.3.7zb1/js/bootstrap.min.js"></script> <script src="https://static.zbmath.org/contrib/bootstrap-lightbox/v0.7.0/bootstrap-lightbox.min.js"></script> <script src="https://static.zbmath.org/contrib/retina/unknown/retina.js"></script> <script src="https://static.zbmath.org/contrib/bootstrap-select/v1.13.14/js/bootstrap-select.min.js"></script> <script> var SCRIPT_ROOT = ""; </script> <script src="/static/scripts.js?v=20240926"> </script> <script src="https://static.zbmath.org/contrib/mathjax/2.7.1/MathJax.js?config=TeX-AMS-MML_HTMLorMML"></script> <script type="text/x-mathjax-config"> MathJax.Hub.Config({ "HTML-CSS": { preferredFont: "TeX", availableFonts: [ "STIX", "TeX" ], linebreaks: { automatic: true }, EqnChunk: (MathJax.Hub.Browser.isMobile ? 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