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(2016)</a>. </div> <div class="abstract">Summary: In this paper, a new modified proximal point algorithm involving fixed point iterates of asymptotically nonexpansive mappings in \(\operatorname {CAT}(0)\) spaces is proposed and the existence of a sequence generated by our iterative process converging to a minimizer of a convex function and a common fixed point of asymptotically nonexpansive mappings is proved.</div> <div class="clear"></div> <br> <div class="citations"><div class="clear"><a href="/?q=rf%3A6610391">Cited in <strong>20</strong> Documents</a></div></div> <div class="classification"> <h3>MSC:</h3> <table><tr> <td> <a class="mono" href="/classification/?q=cc%3A47J25" title="MSC2020">47J25</a> </td> <td class="space"> Iterative procedures involving nonlinear operators </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A47H09" title="MSC2020">47H09</a> </td> <td class="space"> Contraction-type mappings, nonexpansive mappings, \(A\)-proper mappings, etc. </td> </tr><tr> <td> <a class="mono" href="/classification/?q=cc%3A54H25" title="MSC2020">54H25</a> </td> <td class="space"> Fixed-point and coincidence theorems (topological aspects) </td> </tr></table> </div><div class="keywords"> <h3>Keywords:</h3><a href="/?q=ut%3Aconvex+minimization+problem">convex minimization problem</a>; <a href="/?q=ut%3Aresolvent+identity">resolvent identity</a>; <a href="/?q=ut%3A%5C%28%5Coperatorname%7BCAT%7D%280%29%5C%29+space">\(\operatorname{CAT}(0)\) space</a>; <a href="/?q=ut%3Aproximal+point+algorithm">proximal point algorithm</a>; <a href="/?q=ut%3Aasymptotically+nonexpansive+mapping">asymptotically nonexpansive mapping</a></div> <!-- Modal used to show zbmath metadata in different output formats--> <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;"> <!-- alert for connection errors etc --> </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"> <!-- Button trigger metadata modal --> <a type="button" class="btn btn-default btn-xs pdf" data-toggle="modal" data-target="#metadataModal" data-itemtype="Zbl" data-itemname="Zbl 1393.47027" data-ciurl="/ci/06610391" data-biburl="/bibtex/06610391.bib" data-amsurl="/amsrefs/06610391.bib" data-xmlurl="/xml/06610391.xml" > Cite </a> <a class="btn btn-default btn-xs pdf" data-container="body" type="button" href="/pdf/06610391.pdf" title="Zbl 1393.47027 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/10.1186/s13663-016-0559-7" aria-label="DOI for “Some convergence theorems involving proximal point and common fixed points for asymptotically nonexpansive mappings in \(\operatorname {CAT}(0)\) spaces”" title="10.1186/s13663-016-0559-7">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> <div class="references"> <h3>References:</h3> <table><tr> <td>[1]</td> <td class="space">Martinet, B: Réularisation d’inéquations variationnelles par approximations successives. Rev. Fr. Inform. Rech. Oper. 4, 154-158 (1970) · <a href="/0215.21103" class="nowrap">Zbl 0215.21103</a></td> </tr><tr> <td>[2]</td> <td class="space">Rockafellar, RT: Monotone operators and the proximal point algorithm. SIAM J. Control Optim. 14, 877-898 (1976) · <a href="/0358.90053" class="nowrap">Zbl 0358.90053</a> · <a href="https://doi.org/10.1137/0314056" class="nowrap">doi:10.1137/0314056</a></td> </tr><tr> <td>[3]</td> <td class="space">Güler, O: On the convergence of the proximal point algorithm for convex minimization. SIAM J. Control Optim. 29, 403-419 (1991) · <a href="/0737.90047" class="nowrap">Zbl 0737.90047</a> · <a href="https://doi.org/10.1137/0329022" class="nowrap">doi:10.1137/0329022</a></td> </tr><tr> <td>[4]</td> <td class="space">Kamimura, S, Takahashi, W: Approximating solutions of maximal monotone operators in Hilbert spaces. J. Approx. Theory 106, 226-240 (2000) · <a href="/0992.47022" class="nowrap">Zbl 0992.47022</a> · <a href="https://doi.org/10.1006/jath.2000.3493" class="nowrap">doi:10.1006/jath.2000.3493</a></td> </tr><tr> <td>[5]</td> <td class="space">Halpern, B: Fixed points of nonexpanding maps. Bull. Am. Math. Soc. 73, 957-961 (1967) · <a href="/0177.19101" class="nowrap">Zbl 0177.19101</a> · <a href="https://doi.org/10.1090/S0002-9904-1967-11864-0" class="nowrap">doi:10.1090/S0002-9904-1967-11864-0</a></td> </tr><tr> <td>[6]</td> <td class="space">Bačák, M: The proximal point algorithm in metric spaces. Isr. J. Math. 194, 689-701 (2013) · <a href="/1278.49039" class="nowrap">Zbl 1278.49039</a> · <a href="https://doi.org/10.1007/s11856-012-0091-3" class="nowrap">doi:10.1007/s11856-012-0091-3</a></td> </tr><tr> <td>[7]</td> <td class="space">Ariza-Ruiz, D, Leustean, L, López, G: Firmly nonexpansive mappings in classes of geodesic spaces. Trans. Am. Math. Soc. 366, 4299-4322 (2014) · <a href="/1524.47056" class="nowrap">Zbl 1524.47056</a> · <a href="https://doi.org/10.1090/S0002-9947-2014-05968-0" class="nowrap">doi:10.1090/S0002-9947-2014-05968-0</a></td> </tr><tr> <td>[8]</td> <td class="space">Boikanyo, OA, Morosanu, G: A proximal point algorithm converging strongly for general errors. Optim. Lett. 4, 635-641 (2010) · <a href="/1202.90271" class="nowrap">Zbl 1202.90271</a> · <a href="https://doi.org/10.1007/s11590-010-0176-z" class="nowrap">doi:10.1007/s11590-010-0176-z</a></td> </tr><tr> <td>[9]</td> <td class="space">Marino, G, Xu, HK: Convergence of generalized proximal point algorithm. Commun. Pure Appl. Anal. 3, 791-808 (2004) · <a href="/1095.90115" class="nowrap">Zbl 1095.90115</a> · <a href="https://doi.org/10.3934/cpaa.2004.3.791" class="nowrap">doi:10.3934/cpaa.2004.3.791</a></td> </tr><tr> <td>[10]</td> <td class="space">Cholamjiak, P, Abdou, AA, Cho, YJ: Proximal point algorithms involving fixed points of nonexpansive mappings in CAT \((0)\operatorname{CAT}(0)\) spaces. Fixed Point Theory Appl. 2015, 227 (2015) · <a href="/1428.47022" class="nowrap">Zbl 1428.47022</a> · <a href="https://doi.org/10.1186/s13663-015-0465-4" class="nowrap">doi:10.1186/s13663-015-0465-4</a></td> </tr><tr> <td>[11]</td> <td class="space">Agarwal, RP, O’Regan, D, Sahu, DR: Iterative construction of fixed points of nearly asymptotically nonexpansive mappings. J. Nonlinear Convex Anal. 8, 61-79 (2007) · <a href="/1134.47047" class="nowrap">Zbl 1134.47047</a></td> </tr><tr> <td>[12]</td> <td class="space">Dhompongsa, S, Panyanak, B: On △-convergence theorems in CAT \((0)\operatorname{CAT}(0)\) spaces. Comput. Math. Appl. 56, 2572-2579 (2008) · <a href="/1165.65351" class="nowrap">Zbl 1165.65351</a> · <a href="https://doi.org/10.1016/j.camwa.2008.05.036" class="nowrap">doi:10.1016/j.camwa.2008.05.036</a></td> </tr><tr> <td>[13]</td> <td class="space">Khan, SH, Abbas, M: Strong and △-convergence of some iterative schemes in CAT \((0)\operatorname{CAT}(0)\) spaces. Comput. Math. Appl. 61, 109-116 (2011) · <a href="/1207.65069" class="nowrap">Zbl 1207.65069</a> · <a href="https://doi.org/10.1016/j.camwa.2010.10.037" class="nowrap">doi:10.1016/j.camwa.2010.10.037</a></td> </tr><tr> <td>[14]</td> <td class="space">Kirk, WA, Geodesic geometry and fixed point theory, Malaga/Seville, 2002/2003, Seville · <a href="/1058.53061" class="nowrap">Zbl 1058.53061</a></td> </tr><tr> <td>[15]</td> <td class="space">Kirk, WA: Fixed point theory in CAT \((0)\operatorname{CAT}(0)\) spaces and R \(\mathbb{R} \)-trees. Fixed Point Theory Appl. 2004(4), 309-316 (2004) · <a href="/1089.54020" class="nowrap">Zbl 1089.54020</a> · <a href="https://doi.org/10.1155/S1687182004406081" class="nowrap">doi:10.1155/S1687182004406081</a></td> </tr><tr> <td>[16]</td> <td class="space">Chang, SS, Wang, L, Lee, HWJ, Chan, CK, Yang, L: Demiclosed principle and △-convergence theorems for total asymptotically nonexpansive mappings in CAT \((0)\operatorname{CAT}(0)\) spaces. Appl. Math. Comput. 219, 2611-2617 (2012) · <a href="/1308.47060" class="nowrap">Zbl 1308.47060</a></td> </tr><tr> <td>[17]</td> <td class="space">Jost, J: Convex functionals and generalized harmonic maps into spaces of nonpositive curvature. Comment. Math. Helv. 70, 659-673 (1995) · <a href="/0852.58022" class="nowrap">Zbl 0852.58022</a> · <a href="https://doi.org/10.1007/BF02566027" class="nowrap">doi:10.1007/BF02566027</a></td> </tr><tr> <td>[18]</td> <td class="space">Ambrosio, L, Gigli, N, Savare, G: Gradient Flows in Metric Spaces and in the Space of Probability Measures, 2nd edn. Lectures in Mathematics ETH Zurich. Birkhäuser, Basel (2008) · <a href="/1145.35001" class="nowrap">Zbl 1145.35001</a></td> </tr><tr> <td>[19]</td> <td class="space">Xu, HK: An iterative approach to quadratic optimization. J. Optim. Theory Appl. 116, 659-678 (2003) · <a href="/1043.90063" class="nowrap">Zbl 1043.90063</a> · <a href="https://doi.org/10.1023/A:1023073621589" class="nowrap">doi:10.1023/A:1023073621589</a></td> </tr><tr> <td>[20]</td> <td class="space">Tang, JF, Chang, SS, Dong, J: Strong convergence theorems of Cesáro-type means for nonexpansive mapping in CAT \((0)\operatorname{CAT}(0)\) space. Fixed Point Theory Appl. 2015, 100 (2015) · <a href="/1347.65103" class="nowrap">Zbl 1347.65103</a> · <a href="https://doi.org/10.1186/s13663-015-0353-y" class="nowrap">doi:10.1186/s13663-015-0353-y</a></td> </tr><tr> <td>[21]</td> <td class="space">Chidume, CE, Bello, AU, Ndambomve, P: Strong and △-convergence theorems for common fixed points of a finite family of multivalued demicontractive mappings in CAT \((0)\operatorname{CAT}(0)\) spaces. Abstr. Appl. Anal. 2014, Article ID 805168 (2014) · <a href="/1469.65099" class="nowrap">Zbl 1469.65099</a> · <a href="https://doi.org/10.1155/2014/805168" class="nowrap">doi:10.1155/2014/805168</a></td> </tr></table> <div class="reference_disclaimer"> This reference list is based on information provided by the publisher or from digital mathematics libraries. Its items are heuristically matched to zbMATH identifiers and may contain data conversion errors. In some cases that data have been complemented/enhanced by data from zbMATH Open. 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