var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=-23"><img src="//www2.math.ethz.ch/smsjs/images/arrow_left.png"/></a></div><div class="do_not_print" id="arrow_right"><a href="?next=-21"><img src="//www2.math.ethz.ch/smsjs/images/arrow_right.png"/></a></div>    <div class="sms_title">      <span style="float: left;">SMS</span>      <span>SWISS MATHEMATICAL SOCIETY</span>      <span style="float: right;">SMG</span>    </div>    <div class="sms_info">      <span style="float: left; width: 250px;">Bulletin no. 8</span>      <span style="float: right; text-align:right; width: 250px;">12.2 - 16.2.2024</span>      <span style="text-align: center; display: block; width: 250px; margin: auto; position: relative;">Winter Break 2023/24</span>    </div>  </div>  <div></div>  <div id="sms_content">    <div class="day">      <div class="day_title">        Monday, February 12      </div>      <div class="day_content">        <div class="day_content_item normal"><div class="event_location uni_la"><a class="external" href="https://www.epfl.ch">EPF Lausanne</a></div><div class="event_type"><a class="external" href="https://theory.epfl.ch/seminar/">Theory and Combinatorics Seminar</a></div><br /><div class="event_speaker"> Grzegorz Adam Gluch</div><div class="event_title">Title T.B.A.</div><div class="event_time">11:00 &bull; EPF Lausanne</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_zh"><a class="external" href="https://ethz.ch">ETH Z&uuml;rich</a></div><div class="event_type"><a class="external" href="http://www.iaa.tu-bs.de/konmerz/gausseminar/">GAuS Seminar</a></div><br /><div class="event_speaker">Dr. Nikolai  Leopold  (University Basel)</div><div class="event_title">Derivation of the Vlasov-Maxwell system from the Maxwell-Schrödinger  equations with extended charges <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In this talk I will consider the Maxwell-Schrödinger equations in the Coulomb gauge describing the interaction of extended fermions with their self-generatedelectromagnetic field. In the first part, I will explain how these equations heuristically emerge from non-relativistic quantum electrodynamics in a mean-field limit of many fermions. The second part is dedicated to the rigorous derivation of the Vlasov-Maxwell dynamics from the Maxwell-Schrödinger equations with extended charges in the semiclassical regime. The talk is based on a joint work with Chiara Saffirio.</div><div class="event_time">17:00 &bull; Online via Zoom</div>        </div>        <div class="day_content_item important"><div class="event_location uni_zh"><a class="external" href="https://ethz.ch">ETH Z&uuml;rich</a></div><div class="event_type"><a class="external" href="https://math.ethz.ch/s/algebraic-geometry-and-moduli-seminar">Algebraic Geometry and Moduli Seminar</a></div><br /><div class="event_speaker"> Felix Thimm (Univ. of Oslo)</div><div class="event_title">The 3-fold K-theoretic DT/PT vertex correspondence  <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Donaldson-Thomas (DT) and Pandharipande-Thomas (PT) invariants are two curve counting invariants for 3-folds. In the Calabi-Yau case, a correspondence between the numerical DT and PT invariants has been conjectured by Pandharipande and Thomas and proven by Bridgeland and Toda using wall-crossing. For equivariant K-theoretically refined invariants, the DT/PT correspondence reduces to a DT/PT correspondence of equivariant K-theoretic vertices. In this talk I will explain our proof of the equivariant K-theoretic DT/PT vertex correspondence using a K-theoretic version of Joyce\'s wall-crossing setup. An important technical tool is the construction of a symmetized pullback of a symmetric perfect obstruction theory on the orginial DT and PT moduli stacks to a symmetric almost perfect obstruction theory on auxiliary moduli stacks. This is joint work with Henry Liu and Nick Kuhn. </div><div class="event_time">17:30 &bull; Zoom</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, February 13      </div>      <div class="day_content">        <div class="day_content_item no_event">        No events scheduled today!        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Wednesday, February 14      </div>      <div class="day_content">        <div class="day_content_item no_event">        No events scheduled today!        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Thursday, February 15      </div>      <div class="day_content">        <div class="day_content_item normal"><div class="event_location uni_ge"><a class="external" href="https://unige.ch">Université de Genève</a></div><div class="event_type"><a class="external" href="https://www.unige.ch/math/annonces/colloque">Colloque de Mathématiques </a></div><br /><div class="event_speaker"> Andrei Okounkov (Columbia University)</div><div class="event_title">Some new geometric ideas in the spectral analysis of Eisenstein series <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Eisenstein series constitute an important direct summand of the whole space of automorphicfunctions, whose role may be compared to scatteringstates for a quantum many-body system. It is a fundamental problem in the theory of automorphicforms to determine the L^2 spectrum of Laplace and Hecke operators, and for the Eisenstein series thisproblem has been traditionally approached by methods that are very similar to contour integrals ofthe resolvent. In a joint work with David Kazhdan, we propose an alternative set of methods, the essence and advantages of which will be discussed in this talk.</div><div class="event_time">16:15 &bull; Université de Genève, Conseil Général 7-9, Room 1-15</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Friday, February 16      </div>      <div class="day_content">        <div class="day_content_item normal"><div class="event_location uni_ge"><a class="external" href="https://unige.ch">Université de Genève</a></div><div class="event_type"><a class="external" href="https://sites.google.com/view/pm-seminar/home">Physical Mathematics Seminar</a></div><br /><div class="event_speaker"> Federico Ambrosino (DESY)</div><div class="event_title">Exploring (Generalized) QCD_2 with Integrability <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The \'t Hooft model, 2d QCD in the large N limit, offers a unique playground for exploring the dynamics of confinement in gauge theories. In this talk, based onjoint works with S. Komatsu, I will illustrate that the Fredholm integral equation (\'t Hooft equation) determining the masses of mesons in the model is equivalent to finding solutions to a TQ-Baxter equation. This reformulation ofthe problem illustrates a rich analytical structure of the spectrum in the complex plane of the quark masses, and makes possible to extract systematicanalytical expansions for spectral determinants, energy levels, andwavefunctions. I will comment on possible connections between ourtechniques and TS/ST correspondence.Remarkably, this integrable structure is unique to the \'t Hooft model, but persists also in the broad class of theories called generalized QCD, obtainedby replacing the gluon kinetic term with a BF coupling plus a potential for the B-field. I will show that, also in this case, the associated \'t Hooft equation is recasted into a TQ-equation with a transfer matrix given in closed form for anygiven potential. Applying the techniques developed for the \'t Hooft model to these theories allows for a novel systematic study of the spectrum in the complex space of the couplings.</div><div class="event_time">10:30 &bull; Université de Genève, Conseil Général 7-9, Room 1-05</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_la"><a class="external" href="https://www.epfl.ch">EPF Lausanne</a></div><div class="event_type"><a class="external" href="https://www.epfl.ch/labs/anmath/seminars/">Seminar of Analysis </a></div><br /><div class="event_speaker"> Ryan Unger (Princeton University)</div><div class="event_title">Retiring the third law of black hole thermodynamics <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Extremal black holes are exceptional solutions of Einstein’s equations which have absolute zero temperature in the thermodynamic analogy of black hole mechanics. In this talk, I will present a disproof of the “third law of black hole thermodynamics” by showing that extremal black holes can form in the gravitational collapse of charged matter. This has opened the door to studying a new critical phenomenon on the black hole formation threshold that we call “extremal critical collapse.” This is joint work with Christoph Kehle (ETH Zürich).</div><div class="event_time">14:15 &bull; EPF Lausanne, MA B2 485</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_ge"><a class="external" href="https://unige.ch">Université de Genève</a></div><div class="event_type"><a class="external" href="https://www.unige.ch/math/tggroup/doku.php?id=fables">Séminaire "Fables Géométriques" </a></div><br /><div class="event_speaker"> Alexander  Bobenko  (TU Berlin)</div><div class="event_title">Dimers and M-curves <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We develop a general approach to dimer models analogous to Krichever’s scheme in the theory of integrable systems. This leads to dimer models on doubly periodic bipartite graphs with quasiperiodic positive weights. This generalization from Harnack curves to general M-curves leads totransparent algebro-geometric structures. In particular explicitformulas for the Ronkin function and surface tension as integrals ofmeromorphic differentials on M-curves are obtained. Based on Schottky uniformizations of Riemann surfaces we compute the weights and dimer configurations. The computational results are in complete agreement with the theoretical predictions. Also relation to discrete conformalmappings and to hyperbolic polyhedra is explained. This is a joint work with N. Bobenko and Yu. Suris.</div><div class="event_time">14:30 &bull; Université de Genève, Conseil Général 7-9, Room 1-05</div>        </div>      </div>    </div>  </div>  <div id="sms_footer">    address: Alessandra Naldi Windler, Departement Mathematik, HG G 51.4, ETH Zurich, Raemistrasse 101, CH-8092 Zurich<br />    email: <a href="mailto:bulletin@math.ch">bulletin@math.ch</a> | phone: +41 44 632 3684 | url: <a href="https://math.ch">https://math.ch</a>    <br /><br /><img src="//www2.math.ethz.ch/smsjs/sms_logo.gif" width="150" alt="SMS/SMG Logo" title="SMS/SMG Logo" />  </div></div>';