var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=-185"><img src="//www2.math.ethz.ch/smsjs/images/arrow_left.png"/></a></div><div class="do_not_print" id="arrow_right"><a href="?next=-183"><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. 11</span>      <span style="float: right; text-align:right; width: 250px;">1.5 - 5.5.2023</span>      <span style="text-align: center; display: block; width: 250px; margin: auto; position: relative;">Spring Semester 2023</span>    </div>  </div>  <div></div>  <div id="sms_content">    <div class="day">      <div class="day_title">        Monday, May 1      </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://www.unil.ch/dsa/en/home/menuinst/seminaires--evenements/research-seminars.html">Talks in Actuarial Mathematics </a></div><br /><div class="event_speaker"> Phillip Yam (Chinese University of Hong Kong)</div><div class="event_title">Comonotone-Independence Bayes Classifier (CIBer) for FinTech and InsurTech <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Classifying severity of risks has long been of vital importance in insurance and finance, this is a major concern in InsurTech and FinTech. Among widely adopted classifiers in practical use, the application of Support Vector Machine, Neural Network and Logistic Regression to insurance and finance datasets would lead to a potential substantial loss of information as these datasets usually involve a lot of categorical variables, yet none of these classifiers handle them comprehensively; on the other hand, Classification and Regression Tree handles categorical and discrete feature variables well enough by its design, yet it lacks the mechanism to deal with continuous feature variables. Moreover, the relatively strong dependence structures among feature variables, especially among categorical feature variables, in insurance and finance practices have not been explicitly accounted for in the aforementioned existing classifiers. We here propose to effectively model such an implicit strong enough dependence by comonotonicity. Altogether will be dealt with through our newly proposed Comonotone-Independence Bayes Classifier (CIBer), this leads to a far better clustering of the predictive feature variables that can facilitate an effective classification. We shall also demonstrate the effectiveness of CIBer as a tool in data analytics against those common classifiers through the empirical studies upon several representative datasets in finance and insurance. </div><div class="event_time">11:00 &bull; EPF Lausanne, UniL campus, Extranef 110</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"> Pok Him Cheng (Chinese University of Hong Kong)</div><div class="event_title">Assessing Weather Risk: a non-parametric test for network independence with distance covariance <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Network models have received increasing popularity in recent years because of the growing availability of large-scale social network data and the need to model complex systems such as meteorology and biology. In this talk, we first discuss the distance covariance of a set of random vectors in a network by extending the distance covariance introduced by Szekely et al. (2007), where the latter has the crucial feature that it equals zero if and only if two random vectors are independent and thus can detect arbitrary types of non-linear associations. Our proposed measure includes special cases such as the distance covariance between two random vectors, cross-distance covariance and auto-distance covariance in time series and random fields.Based on the new measure, we develop a new test for independence of network data. In particular, we propose a Ljung-Box-type test for associative autocorrelation in a graph-structured network setting. The usefulness of our test is illustrated via extensive simulation studies with various dependency structures, where the critical value of the test can be determined using a permutation test. Our method often outperforms many prevalent ones in the literature, especially when the data exhibits a non-linear relationship. We apply our test to study the goodness-of-fit of a fitted network model based on the residuals. An example is demonstrated using the wind speed data in England and Wales, fitted by a generalized network autoregressive model with spatial and temporal components.</div><div class="event_time">11:40 &bull; EPF Lausanne, UniL campus, Extranef 110</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">Prof. Dr. Sam Payne (UT Austin)</div><div class="event_title">Cohomology groups of moduli spaces of curves <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Algebraic geometry endows the cohomology groups of moduli spaces of curves with additional structures, such as (mixed) Hodge structures and Galois representations. Standard conjectures from arithmetic, regarding analytic continuations of L-functions attached to these Galois representations, lead to striking predictions, by Chenevier and Lannes, about which such structures can appear.  I will survey recent results unconditionally confirming several of these predictions and studying patterns in the appearances of motives of low weight. The latter are governed by the operadic structures induced by tautological morphisms and the cohomology of graph complexes.Based on joint work with Jonas Bergström and Carel Faber; with Sam Canning and Hannah Larson; with Melody Chan and Søren Galatius; and with Thomas Willwacher. </div><div class="event_time">17:30 &bull; Zoom</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, May 2      </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/fim/activities/nachdiplom-lectures">Nachdiplomvorlesung</a></div><br /><div class="event_speaker"> Karoly Böröczky (Alfréd Rényi Institute of Mathematics)</div><div class="event_title">The Isoperimetric inequality, the Brunn-Minkowski theory, and the Lp Minkowski problem</div><div class="event_time">10:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</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"> Laura Ciobanu (Heriot-Watt University, Edinburgh)</div><div class="event_title">Conjugacy growth and languages in groups <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Conjugacy growth in groups has been studied, from a geometric perspective, for many decades. Initially, the growth of conjugacy classes naturally occurred while counting closed geodesics (up to free homotopy) on complete Riemannian manifolds, as formulas for the number of such geodesics give, via quasi-isometry, good estimates for the number of conjugacy classes in the manifolds’ fundamental groups. More recently, the study of conjugacy growth has expanded to groups of all flavours, such as nilpotent, graph and wreath products, Baumslag-Solitar, and more.In this talk I will give an overview of what is known about conjugacy growth and the formal series associated with it in infinite discrete groups. I will highlight how the rationality (or rather lack thereof) of these series is connected to both the algebraic and the geometric nature of groups such as (relatively) hyperbolic or nilpotent, and how tools from analytic combinatorics can be employed in this context. Time permitting, I will also mention results about the languages of conjugacy representatives in various groups.Mardi 2 mai 2023 à 10h30, salle 1-05</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/stoan/probability-stochastic-analysis-seminar/">Probability (and Stochastic Analysis) Seminar </a></div><br /><div class="event_speaker"> Amarjit Budhiraja (University of North Carolina)</div><div class="event_title">Invariant Measures of the Infinite Atlas Model: Domains of Attraction, Extremality, and Equilibrium Fluctuations <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The infinite Atlas model describes a countable system of competing Brownian particles where the lowest particle gets a unit upward drift and the rest evolve as standard Brownian motions. The stochastic process of gaps between the particles in the infinite Atlas model does not have a unique stationary distribution and in fact there is a one parameter family {p(a),a>= 0} of product form mutually singular stationary distributions. We say that an initial distribution of gaps is in the weak domain of attraction of the stationary measure p(a) if the time averaged laws of the stochastic process of the gaps, when initialized using that distribution, converge to p(a) weakly in the large time limit. We provide general sufficient conditions on the initial gap distribution of the Atlas particles for it to lie in the weak domain of attraction of p(a) for each a. Results on extremality and ergodicity of p(a) will also be presented. Finally, we will introduce a SPDE that describes equilibrium fluctuations associated with p(a). This is based on joint works with Sayan Banerjee and Peter Rudzis.</div><div class="event_time">15:00 &bull; EPF Lausanne, Salle CM 0 11</div>        </div>        <div class="day_content_item cancelled"><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/analysis-seminar">Analysis Seminar</a></div><br /><div class="event_speaker">Dr. Francesco Palmurella (Scuola Normale Superiore Pisa)</div><div class="event_title">CANCELLED: Title T.B.A.</div><div class="event_time">15:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</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/mpseminar/seminar.html">Séminaire de Mathématique Physique </a></div><br /><div class="event_speaker"> Sylvia Serfaty (NYU)</div><div class="event_title">Recent developments on Coulomb gases <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We will present a review on results on the Coulomb gas in general dimension: local laws describing the system down to microscale, LDP for empirical field, CLT for fluctuations and hyperuniformity in dimension 2.</div><div class="event_time">16:15 &bull; Université de Genève, Conseil Général 7-9, Room 1-05</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_fr"><a class="external" href="https://www.unifr.ch">Université de Fribourg</a></div><div class="event_type"><a class="external" href="https://www.unifr.ch/math/de/info/kolloquium.html">Colloquium </a></div><br /><div class="event_speaker">Prof. Dr. Alain Valette (Université de Neuchâtel)</div><div class="event_title">The Wasserstein distance on metric trees <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Let $(X,d)$ be a metric space. The Wasserstein distance, or earthmover distance, is a metric on the space of probability measures on $X$, that originates from optimal transportation: if $\\mu,\\nu$ are probability measures on $X$, the Wasserstein distance between $\\mu$ and $\\nu$ intuitively represents the minimal amount of work necessary to transform $\\mu$ into $\\nu$. Since the definition of the Wasserstein distance involves an infimum, it is not expected in general that there is a closed formula for this distance. Such a closed formula however exists for metric trees (i.e. combinatorial trees where the length of an edge can be any positive real number), and this closed formula has an interesting history that makes it suitable for a colloquium talk: it appeared first in computer science papers (Charikar 2002), then surfaced again in bio-mathematics (Evans-Matsen 2012), before catching the interest of pure mathematicians. In joint work with M. Mathey-Prévôt, we advocate that the right framework for this closed formula is real trees (i.e. geodesic metric spaces with the property that any two points are connected by a unique arc); we give two proofs of the closed formula, one algorithmic, the other one connecting with Lipschitz-free spaces from Banach space theory. </div><div class="event_time">17:15 &bull; Université de Fribourg, room Phys 2.52</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Wednesday, May 3      </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/fim/activities/nachdiplom-lectures">Nachdiplomvorlesung</a></div><br /><div class="event_speaker"> Shahar Mendelson (The Australian National University)</div><div class="event_title">Probabilistic methods in Analysis</div><div class="event_time">10:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_fr"><a class="external" href="https://www.unifr.ch">Université de Fribourg</a></div><div class="event_type"><a class="external" href="https://commonweb.unifr.ch/_Science/Math/Pub/Math/seminars/OSgeom-top.html">Oberseminar Geometrie</a></div><br /><div class="event_speaker">Prof. Dr. Ruth Kellerhals (Université de Fribourg)</div><div class="event_title">On the Euler characteristic of hyperbolic orbifolds <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In this talk we present various known results about hyperbolic n-orbifolds of minimal volume for n &#8805; 2 and mention some related open questions. After this motivation, we consider the special case of compact Coxeter orbifolds given by quotients of real hyperbolic space Hn by cocompact discrete reflection groups and discuss some aspects of our recent work for n = 4.</div><div class="event_time">10:20 &bull; Université de Fribourg, room Phys 2.52</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">Prof. Dr. Vivek Shende (UC Berkeley and Univ. of Southern Denmark)</div><div class="event_title">Skein valued curve counting <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We explain how to invariantly count holomorphic curves of all genera with Lagrangian boundary conditions in Calabi-Yau 3-folds.  In the process we discover a natural geometric occurence of the HOMFLYPT skein relations, and prove the Ooguri-Vafa conjecture relating the HOMFLYPT invariant of a knot to the count of curves ending on a certain associated Lagrangian (the knot conormal transplanted to the resolved conifold).  </div><div class="event_time">13:30 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</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/geometry-seminar">Geometry Seminar</a></div><br /><div class="event_speaker"> Nicola Cavallucci (KIT)</div><div class="event_title">Convergence and collapse of CAT(0)-spaces and groups <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />I will present the possible Gromov-Hausdorff limits of geodesically complete, CAT(0)-spaces admitting a discrete group of isometries of bounded codiameter and the structure of the possible limit groups. The focus will be on the collapsing case: namely when the injectivity radius of the quotient space goes to zero along the sequence. Joint work with A.Sambusetti.</div><div class="event_time">15:45 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</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/news-and-events/events/lecture-series/inaugural-introductory-farewell-lectures.html">Farewell Lectures</a></div><br /><div class="event_speaker"> Alain-Sol Sznitman (ETH Zürich)</div><div class="event_title">Of chance and serendipity </div><div class="event_time">17:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room F 30</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Thursday, May 4      </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/fim/activities/nachdiplom-lectures">Nachdiplomvorlesung</a></div><br /><div class="event_speaker"> Brita Nucinkis (Royal Holloway, University of London)</div><div class="event_title">Cohomological methods in group theory</div><div class="event_time">10:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</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"> Goran Popivoda (University of Montenegro, Podgorica)</div><div class="event_title">Extremes of conditionally Gaussian processes <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />For a random element (X, Y ) the component Y is called a random environment, and X is called a random element in the random environment if the properties of X are subject of primary interest, whereas the properties of Y can influence X.<br>Gaussian processes in a random environment, that is, Gaussian processes with random parameters (mean/trend, covariance), are called conditionally Gaussian processes, and they significantly extend the class of processes whose extremes can be studied with the techniques applied to Gaussian processes. For calculating the exact asymptotic behavior of the probability of large extremes of a conditionally Gaussian process, it is necessary to calculate this probability using fixed, non-random parameters, and then average the behavior over all the states of the parameter.<br>This talk gives a summary of our findings in this field.Joint work with Sinisa Stamatovic.</div><div class="event_time">11:00 &bull; EPF Lausanne, UniL campus, Internef building room 123</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/~palmeran/topsem.html">Séminaire de Topologie et Géométrie </a></div><br /><div class="event_speaker"> Damien Calaque (Université de Montpellier)</div><div class="event_title"> </div><div class="event_time">13:15 &bull; Université de Genève, Conseil Général 7-9, Room 1-15</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_ba"><a class="external" href="https://unibas.ch">Universität Basel</a></div><div class="event_type"><a class="external" href="https://dmi.unibas.ch/de/forschung/mathematik/zahlentheorie/">Seminar Zahlentheorie</a></div><br /><div class="event_speaker"> Jérôme Poineau (Université de Caen)</div><div class="event_title">Torsion points of elliptic curves via Berkovich spaces over Z <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Berkovich spaces over Z may be seen as fibrations containing complex analytic spaces as well as p-adic analytic spaces, for every prime number p. We will give an introduction to those spaces and explain how they may be used in an arithmetic context to prove height inequalities. As an application, following a strategy by DeMarco-Krieger-Ye, we will give a proof of a conjecture of Bogomolov-Fu-Tschinkel on uniform bounds on the number of common images on P^1 of torsion points of two elliptic curves.</div><div class="event_time">14:15 &bull; Universität Basel, Spiegelgasse 5, SR 05.002</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://www.math.uzh.ch/mat675.1">PDE and Mathematical Physics</a></div><br /><div class="event_speaker">Rita Teixeira da Costa (University of Cambridge)</div><div class="event_title">The Teukolsky equation in the full subextremal range <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The Teukolsky equation is one of the fundamental equations governing linear gravitational perturbations of the Kerr black hole family as solutions to the vacuum Einstein equations. We show that solutions arising from suitably regular initial data decay inverse polynomially in time. Our proof holds for the entire subextremal range of Kerr black hole parameters, \\(\\vert a\\vert &lt; M\\). This is joint work with Yakov Shlapentokh-Rothman (Toronto).</div><div class="event_time">16:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 19.1</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_ba"><a class="external" href="https://unibas.ch">Universität Basel</a></div><div class="event_type"><a class="external" href="https://www.ntwebseminar.org/">Number Theory Web Seminar</a></div><br /><div class="event_speaker"> Peter Koymans (University of Michigan)</div><div class="event_title">Counting nilpotent extensions <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We discuss some recent progress towards the strong form of Malle’s conjecture. Even for nilpotent extensions, only very few cases of this conjecture are currently known. We show how equidistribution of Frobenius elements plays an essential role in this problem and how this can be used to make further progress towards Malle’s conjecture. We will also discuss applications to the Massey vanishing conjecture and to lifting problems. This is joint work with Carlo Pagano.</div><div class="event_time">17:00 &bull; Universität Basel, online Seminar</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/talks-in-financial-and-insurance-mathematics">Talks in Financial and Insurance Mathematics</a></div><br /><div class="event_speaker">Prof. Dr. Vincent Tassion (ETH Z&uuml;rich, Switzerland)</div><div class="event_title">Noise sensitivity of percolation <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Consider critical site Bernoulli percolation on the triangular lattice, where each vertex is colored black or white with probability 1/2, independently of the other vertices. In 1999, Benjamini, Kalai and Schramm proved that crossing probabilities are noise sensitive: resampling a small proportion of the vertices lead to an independent percolation picture. Ten years later, Garban, Pete and Schramm obtained a sharp quantitative version of this result. These works rely on Fourier analysis, and are restricted to Bernoulli percolation (i.e. product measure) and the independent resampling dynamics. In this talk, we will first introduce and discuss the general question of noise sensitivity, focusing mostly on percolation applications. Then we will present a recent and robust approach that relies on geometrical arguments and not on spectral methods.Based on joint works with Hugo Vanneuville.</div><div class="event_time">17:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Friday, May 5      </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_nolink">Talks in Mathematical Finance </a></div><br /><div class="event_speaker"> Boris Vallee (Harvard Business School)</div><div class="event_title">FinTech Lending and Cashless Payments <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We uncover an informational synergy between FinTech lending and cashless payments. Theoretically, FinTech lenders screen borrowers more efficiently when borrowers use cashless payments that produce transferable and verifiable information. In turn, a strategic consideration to stand out from non-adopting borrowers pushes borrowers to adopt cashless payments. Empirically, a larger use of cashless payments predicts a higher likelihood of loan approval, a lower interest rate, and a higher loan amount, especially for firms of higher credit quality. This synergy provides an economic rationale for open banking, and more broadly for data sharing and a lending model without traditional banking relationships.</div><div class="event_time">10:30 &bull; EPF Lausanne, UniL campus, Extranef 126</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_ba"><a class="external" href="https://unibas.ch">Universität Basel</a></div><div class="event_type"><a class="external" href="https://dmi.unibas.ch/de/forschung/mathematik/seminar-in-numerical-analysis">Seminar in Numerical Analysis</a></div><br /><div class="event_speaker"> Elena Moral Sánchez (Max-Planck Institute for Plasma Physics)</div><div class="event_title">The cold-plasma model and simulation of wave propagation using B-Spline Finite Elements <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The cold-plasma wave equation describes the propagation of an electromagnetic wave in a magnetized plasma, which is an inhomogeneous, dispersive and anisotropic medium. The thermal effects are assumed to be negligible, which leads to a linear partial differential equation. Besides, we assume that the electromagnetic field of the propagating wave is in the time-harmonic regime.This model has applications in magnetic confinement fusion devices, like the Tokamak. Namely, electromagnetic waves are used to heat up the plasma (Electron cyclotron resonance heating (ECRH)) or for interferometry and reflectometry diagnostics (to measure plasma density and position, etc.).<br>In the first part of this talk, we introduce the cold-plasma model, together with a qualitative study of the plasma modes which expose the complexity of the problem.In the second part, we describe the problem and the simplifications we carry out, which yield the indefinite Helmholtz equation. It is solved with B-Spline Finite Elements provided by the Psydac library and some results are shown. Lastly, we discuss the performance and potential ways of preconditioning.</div><div class="event_time">11:00 &bull; Universität Basel, Spiegelgasse 5, SR 05.002</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/number-theory-seminar">Number Theory Seminar</a></div><br /><div class="event_speaker">Prof. Dr. Martin Raum (Chalmers Technical University, Gothenburg)</div><div class="event_title">Polyharmonic Maass forms and cyclic representations of the Gelfand quiver <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Polyharmonic Maass forms are generalizations of classical elliptic modular forms that obey weaker differential equations than the Cauchy-Riemann equations, and thus form a richer class of functions which accommodate, for instance, some generating series of period integrals. Their differential properties are captured by cyclic Harish-Chandra modules, which are in ono-to-one correspondence with cyclic representations of the two-cyclic and the Gelfand quiver. We show that all latter representations arise from polyharmonic Maass forms, and provide a explicit construction, which has a natural interpretation in terms of tensor products of Harish-Chandra modules.</div><div class="event_time">14:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</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">Prof. Dr. Irfan  Glogic (Universität Wien)</div><div class="event_title">Title T.B.A.</div><div class="event_time">14:15 &bull; EPF Lausanne, Salle MA B2 485 </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"> Peter Orbanz (UCL)</div><div class="event_title">Statistical implications of group invariance of distributions <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Consider a large random structure -- a random graph, a stochastic process on the line, a random field on the grid -- and a function that depends only on a small part of the structure. Now use a family of transformations to ‘move’ the domain of the function over the structure, collect each function value, and average. Under suitable conditions, the law of large numbers generalizes to such averages; that is one of the deep insights of modern ergodic theory.<br>The work I will present here shows that central limit theorems and other higher-order properties also hold. Loosely speaking, if the i.i.d. assumption of classical statistics is substituted by suitable properties formulated in terms of groups, the fundamental theorems of inference still hold.</div><div class="event_time">15:15 &bull; EPF Lausanne, Salle GA 3 21 </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">Prof. Dr. Vivek Shende (UC Berkeley and Uniersity of Southern Denmark)</div><div class="event_title">Skein valued mirror symmetry <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We show how, at least in some class of examples ("Reeb-positive"), the all-genus skein-valued curve count on a non-compact Lagrangian (e.g. a Harvey-Lawson brane in a toric CY3) is annihilated by an operator equation which is a skein-valued quantization of the mirror curve.  As an application we prove the all-color version of the Ooguri-Vafa conjecture mentioned above. </div><div class="event_time">16:00 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</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>';