var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=-4"><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;">24.6 - 28.6.2024</span>      <span style="text-align: center; display: block; width: 250px; margin: auto; position: relative;">Summer Break 2024</span>    </div>  </div>  <div></div>  <div id="sms_content">    <div class="day">      <div class="day_title">        Monday, June 24      </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"> Kiran Kedlaya (UCSD)</div><div class="event_title">The relative class number one problem for function fields <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />For any finite extension of function fields of curves over finite fields, the relative class number is a positive integer. The question of classifying all cases where this integer equals 1 was first discussed by Leitzel and Madan in 1976, but seems to have received little attention subsequently. We survey our recent solution of this problem, which shares many ingredients with the literature on bounding the maximal number of points on a curve of fixed genus over a fixed finite fields. Among these are the use of exhaustive searches for Weil polynomials (a/k/a "Lauter\'s method"); "linear programming" bounds based on Weil\'s explicit formula; and some character-theoretic arguments to rule out noncyclic Galois groups. We also discuss the prospect of establishing effective lower bounds on relative class numbers in general.</div><div class="event_time">13:15 &bull; EPF Lausanne, CM 1 517</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, June 25      </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"> Alina Bucur</div><div class="event_title">Effective Sato-Tate under GRH <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The Sato-Tate conjecture tells us about the distribution of the coefficients of the L-function of an elliptic curve -- in which case it is a theorem -- or more generally of an abelian variety. We will talk about how to make it effective if one assumes the generalized Riemann hypothesis and present some applications of the effective version to both elliptic curves and higher dimension abelian varieties. This is joint work with Fite and Kedlaya.</div><div class="event_time">11:15 &bull; EPF Lausanne, CM1 514</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/annonces/seminaire-danalyse-numerique">Séminaire d\'Analyse Numérique </a></div><br /><div class="event_speaker"> Domingo  Hernández Abreu (Universidad de La Laguna, Canary Islands)</div><div class="event_title">Approximate Matrix Factorization and W-methods for the time integration of multidimensional parabolic problems  <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />This talk deals with the time-integration of space-discretised parabolic problems subject to Dirichlet boundary conditions on a rectangular m-dimensional domain.We consider the combination of linearly implicit methods (W-methods) along with Approximate Matrix Factorization based on an alternating direction implicit approach, which allows to reduce the algebra cost to the level of 1D problems. Optimal results on PDE-convergence will be presented for linear problems, the Euclidean norm and arbitrary spatial dimensions m &#8805; 2. Some techniques aimed at mitigating the order reduction phenomenon due to time-dependent boundary conditions are also presented and numerically illustrated in two and three spatial dimensions.This talk is based on joint work with S. González-Pinto, E. Hairer and S. Pérez-Rodríguez.</div><div class="event_time">14:00 &bull; Université de Genève, Conseil Général 7-9, Room 1-15 (unusual room!)</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"> Nikolai  Perry (Edinburgh)</div><div class="event_title">Graded Necklace Lie Bialgebras & Batalin-Vilkovisky Formalism <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The necklace Lie bialgebra is constructed from the double of a quiver. Its Lie bracket has been related to a canonical Poisson structure on the representation variety of the double quiver via a trace map. What about the Lie cobracket? By encoding the necklace Lie bialgebra in a Batalin-Vilkovisky (BV) algebra \'B\', we show that the Lie cobracket can be viewed from the perspective of a suitable representation variety. This representation variety carries a non-degenerate pairing, inducing a canonical BV operator on a quotient of its algebra of functions \'O\' — we construct a BV algebra morphism B --> O which preserves information of both the necklace bracket and cobracket. In addition, we generalise the necklace Lie bialgebra, as well as the above construction, to the Z_2-graded setting.</div><div class="event_time">15:30 &bull; Université de Genève, Conseil Général 7-9, Room 1-07</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_ne"><a class="external" href="https://unine.ch">Université de Neuchâtel</a></div><div class="event_type"><a class="external" href="http://www.unine.ch/math/home/colloques_et_seminaires/les-colloques-du-mardi.html">Colloque du Mardi </a></div><br /><div class="event_speaker"> Cedric Villani (Univ. Bernard Lyon I & IHES)</div><div class="event_title">Information de Fisher et équations cinétiques <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Je passerai en revue quelques occasions où l\'information de Fisher joue un rôle clé en théorie des équations de Boltzmann, Fokker-Planck, Landau, avec un accent particulier sur les découvertes récentes en théorie cinétique collisionnelle homogène à interaction très singulière (travaux de Guillen et Silvestre, et les miens propres)</div><div class="event_time">17:15 &bull; Université de Neuchâtel, B013 </div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Wednesday, June 26      </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. Carl Lian (Tufts University)</div><div class="event_title">Enumerativity of fixed-domain Gromov-Witten invariants <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />It is well-understood that Gromov-Witten (GW) invariants often fail to be enumerative. For example, when r is at least 3, the higher-genus GW invariants of P^r fail to count smooth curves in projective space in any transparent sense. The situation seems to be better when one fixes the complex structure of the domain curve. It was originally speculated that if X is a Fano variety, then the "fixed-domain" GW count of curves of sufficiently large degree passing through the maximal number of general points is enumerative. I will discuss some positive and negative results in this direction, focusing on the case of hypersurfaces. The most recent results are joint with Roya Beheshti, Brian Lehmann, Eric Riedl, Jason Starr, and Sho Tanimoto, and build on earlier work with Rahul Pandharipande and Alessio Cela.</div><div class="event_time">13:30 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 19.1</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Thursday, June 27      </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. CM 1 517</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"> Lena Ji (Michigan)</div><div class="event_title">Title T.B.A.</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, June 28      </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. Younghan Bae (Utrecht University)</div><div class="event_title">Fourier transform and the class of Abel-Jacobi sections <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />After the work of Beauville and Deninger-Murre, Fourier transformation plays an important role to study the Chow group of abelian schemes. Arinkin extended the Fourier transformation to the relative compactified Jacobian of a family of integral local planar curves. In this talk, I will explain how Arinin’s Fourier transform can be used to compute the class of Abel-Jacobi sections on the relative Jacobian over the moduli space of integral nodal curves. This result partially recovers Pixton’s formula of Abel-Jacobi section proven by Bae-Holmes-Pandharipande-Schmitt-Schwarz. This is a joint work in progress with S. Molcho.</div><div class="event_time">14:30 &bull; ETH Zentrum, Building ITS, Room  </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/schools/sb/research/math/statistics-seminars/">Statistics Seminar </a></div><br /><div class="event_speaker"> Daniel Garcia Rasines (Imperial College London)</div><div class="event_title">Randomized selective inference <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In contemporary statistical applications, selection of the formal inferential problem is typically done after some level of interaction with the data. Usually, an initial exploratory analysis is used to identify interesting aspects of the population under study, and then the same dataset is used to learn about them. Such “data snooping” invalidates classical inferential procedures. Many approaches have been proposed to ensure inferential validity in these settings.In this talk, I will present an alternative to data splitting based on randomization which allows for higher selection and inferential power. I will describe the theoretical and empirical advantages of this method and discuss some related problems of current interest. </div><div class="event_time">15:15 &bull; EPF Lausanne, CM 1 517</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>';