var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=0"><img src="//www2.math.ethz.ch/smsjs/images/arrow_left.png"/></a></div><div class="do_not_print" id="arrow_right"><a href="?next=2"><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. 4</span>      <span style="float: right; text-align:right; width: 250px;">12.1 - 16.1.2026</span>      <span style="text-align: center; display: block; width: 250px; margin: auto; position: relative;">Winter Break 2025/26</span>    </div>  </div>  <div></div>  <div id="sms_content">    <div class="day">      <div class="day_title">        Monday, January 12      </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/seminaires/lie-sem/">Lie groups and moduli spaces </a></div><br /><div class="event_speaker"> Filip  Zivanovic  (Stony Brook University)</div><div class="event_title">Modified necklace Lie bialgebras & quartic BV structures in supercategories <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 present the computation of algebraic multiplicities in Hilbert schemes of points on certain symplectic surfaces S. These spaces arise as Moduli spaces of Higgs bundles, and in the conjectural Kapustin-Witten mirror symmetry of these spaces, these multiplicities show up naturally, hence the motivation for this work.On the other hand, we also compute the Floer-theoretic filtration, previously connected to the multiplicities for these surfaces S themselves, realising that in their Hilbert schemes, these two invariants somewhat diverge from each other, discovering different geometric data of the space. Joint work with Alexandre Minets. </div><div class="event_time">10:15 &bull; Université de Genève, Conseil Général 7-9, Room 1-07</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.unil.ch/dsa/en/home/menuinst/seminaires--evenements/research-seminars.html">Talks in Actuarial Mathematics </a></div><br /><div class="event_speaker"> Patrick  Wong  (Monash University)</div><div class="event_title">Valuation of variable annuities in a general stochastic environment <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />This paper develops an advanced analytical framework for pricing Guaranteed Minimum Maturity Benefits (GMMB) within a stochastic environment featuring general dependencies. The model assumes stochastic dynamics for jump intensity, interest rates, and volatility, explicitly incorporating interdependencies among these risk factors. A significant contribution of this research is the derivation of analytical, closed-form solutions for pricing, as well as the computation of first, second, and mixed (cross) sensitivities to model parameters. These higher-order derivatives are obtained efficiently using the derivative of the matrix exponential. Despite the high flexibility of the model, our method ensures that both pricing and risk management remain computationally efficient.</div><div class="event_time">11:00 &bull; EPF Lausanne, Extranef 125</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, January 13      </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/seminaire-danalyse-numerique">Séminaire d\'Analyse Numérique </a></div><br /><div class="event_speaker"> Michael Tretyakov (Nottingham)</div><div class="event_title">Title T.B.A.</div><div class="event_time">14:00 &bull; Université de Genève, Conseil Général 7-9, Room 1-05</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/seminaires/lie-sem/">Lie groups and moduli spaces </a></div><br /><div class="event_speaker"> Yan  Zhou  (Tsinghua University)</div><div class="event_title">Crystals arising from the geometry of spectral curves <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We associate a family of classical spectral curves to certain quantum differential equations with irregular singularities. In a maximally degenerate scaling regime—the caterpillar limit—these curves admit a global description governed by Gelfand–Tsetlin patterns. Using periods of natural cycles on the curves, we explain how the type A crystal operators on GT patterns arise geometrically, and how this picture connects to BPS states and spectral networks. Joint work in progress with Andrew Neitzke and Xiaomeng Xu.</div><div class="event_time">15:30 &bull; Université de Genève, Conseil Général 7-9, Room 1-07</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Wednesday, January 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, January 15      </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://calendar.google.com/calendar/embed?mode=AGENDA&height=600&wkst=2&bgcolor=%23FFFFFF&src=t36it03v52cus2detrvinlgk18%40group.calendar.google.com&color=%235F6B02&ctz=Europe%2FZurich">Groups, Arithmetic and Algebraic Geometry Seminar </a></div><br /><div class="event_speaker"> Christopher  Smyth  (University of Edinburgh)</div><div class="event_title">Spectral structures arising from integer polynomials <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In 1979 David Boyd conjectured that the set of Mahlermeasures of polynomials with integer coefficients forms a closed subset of thereal line.In the first part of the talk I’ll outline the origins and basicfacts about Mahler measure, as well as formulae for specific measures, and themotivation behind Boyd’s conjecture. I’ll then discuss a recent stronger conjecture than Boyd’s,which relates the set of these Mahler measures to other spectral sets of knownstructure, also coming from integer polynomials.(30 minutes general talk, followed by 45minutes of more specialized talk) </div><div class="event_time">14:15 &bull; EPF Lausanne, CM 1 517</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Friday, January 16      </div>      <div class="day_content">        <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="https://math.ethz.ch/s/algebraic-geometry-and-moduli-seminar">Algebraic Geometry and Moduli Seminar</a></div><br /><div class="event_speaker">Dr. Francesca Carocci (Roma Tor Vergata)</div><div class="event_title">Correlated Gromov-Witten invariants & DR cycle formula I <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In this first talk, we will talk about a geometricrefinement for log Gromov -Witten invariants of P^1-bundles on smoothprojective varieties, called correlated Gromov-Witten invariants,introduced in a joint work with T. Blomme. In order to compute them, weproved a correlated refinement of Pixton double-ramification cycleformula with target varieties. We will state the formula and try to give an idea of how it is obtained as an application of the Universal DR formula of Bae-Holmes-Pandharipande-Schmitt-Schwarz.</div><div class="event_time">16:00 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room D 3.2</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="https://math.ethz.ch/s/algebraic-geometry-and-moduli-seminar">Algebraic Geometry and Moduli Seminar</a></div><br /><div class="event_speaker">Dr. Thomas Blomme (Universite de Neuchatel)</div><div class="event_title">Correlated Gromov-Witten invariants & DR cycle formula II <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Abelian surfaces are complex tori whose enumerativeinvariants seem to satisfy remarkable regularity properties. Thecomputation of their reduced Gromov-Witten invariants in the case ofprimitive classes has already been well studied with many completecomputations by Bryan-Oberdieck-Pandharipande-Yin. A few years ago, G.Oberdieck conjectured a multiple cover formula expressing in a verysimple way the invariants for the non-primitive classes in terms of theprimitive one. This would close the computation of GW invariants forabelian surfaces. In this second talk, we aim to explain how correlated invariants naturally show up in the decomposition formula for abelian surfaces, and how they allow to prove the multiple cover formula conjecture for many instances. This is joint work with F. Carocci.</div><div class="event_time">17:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room D 3.2</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>';