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MSC2020 database
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}); </script> <div class="folderWrap1"> <div class="folderWrap2"> <div class="folderWrap4"> <div class="folderContent"> <form name="searchMSC2" method="get" action="msc2020.html" style="width: auto;"> <div class="summary" id="summary2"> </div> <br style="clear: both;" /> <div class="widgets"> <div class="controlsPosition2"> <h3>Browse Classification</h3> <span class="enter_msc" style="float:both;">Select a 2 digit classification</span><br /> <select name="t" id="selectTarget2" tabindex="1" onchange="if (this.value != '') { this.form.elements[2].click(); }"> <option value="">Select a Mathematics subject classification</option> <option value="00-XX">00 General and overarching topics; collections</option> <option value="01-XX">01 History and biography</option> <option value="03-XX">03 Mathematical logic and foundations</option> <option value="05-XX">05 Combinatorics </option> <option value="06-XX">06 Order, lattices, ordered algebraic structures</option> <option value="08-XX">08 General algebraic systems</option> <option value="11-XX">11 Number theory</option> <option value="12-XX">12 Field theory and polynomials</option> <option value="13-XX">13 Commutative algebra</option> <option value="14-XX">14 Algebraic geometry</option> <option value="15-XX">15 Linear and multilinear algebra; matrix theory</option> <option value="16-XX">16 Associative rings and algebras </option> <option value="17-XX">17 Nonassociative rings and algebras</option> <option value="18-XX">18 Category theory; homological algebra </option> <option value="19-XX">19 $K$-theory</option> <option value="20-XX">20 Group theory and generalizations</option> <option value="22-XX">22 Topological groups, Lie groups </option> <option value="26-XX">26 Real functions</option> <option value="28-XX">28 Measure and integration </option> <option value="30-XX">30 Functions of a complex variable</option> <option value="31-XX">31 Potential theory </option> <option value="32-XX">32 Several complex variables and analytic spaces </option> <option value="33-XX">33 Special functions (33-XX deals with the properties of functions as functions) </option> <option value="34-XX">34 Ordinary differential equations</option> <option value="35-XX">35 Partial differential equations</option> <option value="37-XX">37 Dynamical systems and ergodic theory</option> <option value="39-XX">39 Difference and functional equations</option> <option value="40-XX">40 Sequences, series, summability</option> <option value="41-XX">41 Approximations and expansions </option> <option value="42-XX">42 Harmonic analysis on Euclidean spaces</option> <option value="43-XX">43 Abstract harmonic analysis </option> <option value="44-XX">44 Integral transforms, operational calculus </option> <option value="45-XX">45 Integral equations</option> <option value="46-XX">46 Functional analysis </option> <option value="47-XX">47 Operator theory</option> <option value="49-XX">49 Calculus of variations and optimal control; optimization</option> <option value="51-XX">51 Geometry </option> <option value="52-XX">52 Convex and discrete geometry</option> <option value="53-XX">53 Differential geometry </option> <option value="54-XX">54 General topology </option> <option value="55-XX">55 Algebraic topology</option> <option value="57-XX">57 Manifolds and cell complexes </option> <option value="58-XX">58 Global analysis, analysis on manifolds</option> <option value="60-XX">60 Probability theory and stochastic processes </option> <option value="62-XX">62 Statistics</option> <option value="65-XX">65 Numerical analysis</option> <option value="68-XX">68 Computer science </option> <option value="70-XX">70 Mechanics of particles and systems </option> <option value="74-XX">74 Mechanics of deformable solids</option> <option value="76-XX">76 Fluid mechanics </option> <option value="78-XX">78 Optics, electromagnetic theory </option> <option value="80-XX">80 Classical thermodynamics, heat transfer </option> <option selected="selected" value="81Q10">81 Quantum theory</option> <option value="82-XX">82 Statistical mechanics, structure of matter</option> <option value="83-XX">83 Relativity and gravitational theory</option> <option value="85-XX">85 Astronomy and astrophysics </option> <option value="86-XX">86 Geophysics</option> <option value="90-XX">90 Operations research, mathematical programming</option> <option value="91-XX">91 Game theory, economics, finance, and other social and behavioral sciences</option> <option value="92-XX">92 Biology and other natural sciences</option> <option value="93-XX">93 Systems theory; control </option> <option value="94-XX">94 Information and communication theory, circuits</option> <option value="97-XX">97 Mathematics education</option> </select> </div> <div class="controlsPosition"> <h3>Search Classifications</h3> <span class="enter_msc">Enter a keyword, phrase or a 2-, 3-, or 5-digit classification</span><br /> <input size="40" autocomplete="off" name="s" value="" id="search2" /> <div class="buttonBox"> <input name="btn" type="submit" value="Search" class="button" /> </div> </div> </div> <input type="hidden" name="ls" value="Ct" /> <div class="resultSet" id="resultSet2"> <div class="buttonBox"> <input type="submit" name="btn" value="Clear" class="button" /> </div> <span class="legend"> < <a href="msc2020.html?t=81Pxx&btn=Current">81Pxx</a> | <a href="msc2020.html?t=81-XX&btn=Current">81-XX</a> | <a href="msc2020.html?t=81Rxx&btn=Current">81Rxx</a> > </span> <table class="results"> <tr class="current"> <td><a href="msc2020.html?t=81-XX&btn=Current" title=""><b>81-XX</b></a></td> <td></td> <td></td> <td><b>Quantum theory</b></td> </tr> <tr class="current"> <td></td> <td><a href="msc2020.html?t=81Qxx&btn=Current" title="">81Qxx</a></td> <td></td> <td>General mathematical topics and methods in quantum theory</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q05 </td> <td>Closed and approximate solutions to the Schr枚dinger, Dirac, Klein-Gordon and other equations of quantum mechanics</td> </tr> <tr class="current"> <td></td> <td></td> <td><span class="highlight">81Q10</span> </td> <td>Selfadjoint operator theory in quantum theory, including spectral analysis</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q12 </td> <td>Nonselfadjoint operator theory in quantum theory including creation and destruction operators</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q15 </td> <td>Perturbation theories for operators and differential equations in quantum theory</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q20 </td> <td>Semiclassical techniques, including WKB and Maslov methods applied to problems in quantum theory</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q30 </td> <td>Feynman integrals and graphs; applications of algebraic topology and algebraic geometry [See also <a href="msc2020.html?t=05Cxx&btn=Current">05Cxx</a>, <a href="msc2020.html?t=14D05&btn=Current">14D05</a>, <a href="msc2020.html?t=32S40&btn=Current">32S40</a>]</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q35 </td> <td>Quantum mechanics on special spaces: manifolds, fractals, graphs, lattices [See also <a href="msc2020.html?t=81R20&btn=Current">81R20</a>]</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q37 </td> <td>Quantum dots, waveguides, ratchets, etc. [See also <a href="msc2020.html?t=82D20&btn=Current">82D20</a>, <a href="msc2020.html?t=82D77&btn=Current">82D77</a>]</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q40 </td> <td>Bethe-Salpeter and other integral equations arising in quantum theory</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q50 </td> <td>Quantum chaos [See also <a href="msc2020.html?t=37D45&btn=Current">37D45</a>]</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q60 </td> <td>Supersymmetry and quantum mechanics</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q65 </td> <td>Alternative quantum mechanics (including hidden variables, etc.)</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q70 </td> <td>Differential geometric methods, including holonomy, Berry and Hannay phases, Aharonov-Bohm effect, etc. in quantum theory</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q80 </td> <td>Special quantum systems, such as solvable systems</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q93 </td> <td>Quantum control</td> </tr> <tr class="current"> <td></td> <td></td> <td>81Q99 </td> <td>None of the above, but in this section</td> </tr> </table> <div class="buttonBox"> <input type="submit" name="btn" value="Clear" class="button" /> </div> <span class="legend"> < <a href="msc2020.html?t=81Pxx&btn=Current">81Pxx</a> | <a href="msc2020.html?t=81-XX&btn=Current">81-XX</a> | <a href="msc2020.html?t=81Rxx&btn=Current">81Rxx</a> > </span> </div> </form> </div> <div class="folderFooter"><div class="left"> </div><div class="right"> </div></div> </div> </div> </div> <div class="copyright"> <a href="http://www.ams.org/ams/copyright.html">© Copyright 2024, American Mathematical Society</a><br /> <a href="http://www.ams.org/ams/privacy.html">Privacy Statement</a> </div> <div class="amsAddress"> <a href="http://www.ams.org"><img src="/mathscinet/2006/mathscinet/images/ams-logo-msn-footer.jpg" alt="American Mathematical Society" /></a> </div> </div> <script type="text/javascript"> <!-- setCurrentTab( 2 ); 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