var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=-63"><img src="//www2.math.ethz.ch/smsjs/images/arrow_left.png"/></a></div><div class="do_not_print" id="arrow_right"><a href="?next=-61"><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. 13</span>      <span style="float: right; text-align:right; width: 250px;">15.5 - 19.5.2023</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 15      </div>      <div class="day_content">        <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="https://www.unine.ch/math/home/colloques_et_seminaires/seminaires-de-linstitut.html">Groups and Analysis </a></div><br /><div class="event_speaker"> Brita Nucinkis (Royal Holloway University, London)</div><div class="event_title">On generalisations of Thompson’s group V <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br /> In the 1960s R. Thompson defined three groups, F, T and V, all of which have shown to have surprising properties. For example, V was the first example finitely presented infinite simple group. In the early 2000s Nekrashevych and Matui realised these as topological full groups of some Cuntz-Algebras. In this talk I will give an overview over some generalisations of V, especially those that are automorphism groups of Cantor-algebras. As it turns out, these can also be realised as topological full groups of certain groupoids coming from higher rank graphs.  This is ongoing work with C. Martinez-Perez and A. Vdovina.</div><div class="event_time">10:15 &bull; Université de Neuchâtel, Rue Emile Argand 11, Auditoire B217</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/mat760">Ergodic theory and dynamical systems seminar</a></div><br /><div class="event_speaker">Prof. Dr. Viviane Baladi (CNRS, Sorbonne Université & ITS-ETHZ)</div><div class="event_title">A parameter almost sure invariance principle (ASIP) for the quadratic family <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />After recalling what is an ASIP and how it can appear in dynamics, we will discuss and motivate the following joint result with Magnus Aspenberg and Tomas Persson: Consider the quadratic family \\(T_a(x) = a x (1 - x)\\), for \\(x\\) in \\([0, 1]\\) and parameters a in \\((2,4)\\). For any transversal Misiurewicz parameter b, we find a positive measure subset Omega of mixing Collet-Eckmann parameters such that for any Holder function f with nonvanishing autocorrelation for b, the functions \\(f_a(T_a^{k}(1/2))\\) (where \\(f_a\\) is a suitable normalisation of \\(f\\)) for the normalised Lebesgue measure on a positive measure subset of Omega (depending on \\(f\\)) satisfy an ASIP.</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_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"> Evgeniy Lokharu (Lund University)</div><div class="event_title">Extreme water waves <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 will give a brief overview of the field and will discuss some new results on extreme water waves, also known as waves of greatest height. These are singular solutions to the two-dimensional Euler equations and are characterized by sharp crests with an included angle of 120 degrees. Mathematical theory of extreme water waves remained one of the central topics in the area for a long time and to a large extent determined the development of the field for many decades. In the talk we will explain about the problem and will discuss some new progress on it. We will also outline some open questions related to the existence and regularity of extreme waves.</div><div class="event_time">14:15 &bull; Université de Genève, Conseil Général 7-9, Room 1-15</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_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/symplectic-geometry-seminar">Symplectic Geometry Seminar</a></div><br /><div class="event_speaker"> Sara Kalisnik (ETH Zürich)</div><div class="event_title">Parametrized Homology & Sensor Networks <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />An important problem with sensor networks is that they do not provideinformation about the regions that are not covered by their sensors. If thesensors in a network are static, then the Alexander Duality Theorem fromclassic algebraic topology is sufficient to determine the coverage of anetwork. However, in many networks the sensors change position with time.In the case of dynamic sensor networks, one considers the covered anduncovered regions as parametrized spaces with respect to time. In thistalk, I will define parametrized homology, a variant of zigzag persistenthomology that measures how the homology of the level sets of the spacechanges as we vary the parameter. I will also present a version of theAlexander Duality Theorem in the setting of parametrized homology. Thisapproach sheds light on the practical problem of loss of coverage withindynamic sensor networks.</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"> Ajay Chandra & Ilya Chevyrev  (Imperial College & University of Edinburgh)</div><div class="event_title">Loop expansions for lattice gauge theories <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In this two-part talk, we will present a loop expansion for lattice gauge theories and show how it applies to show ultraviolet stability in the Abelian Higgs model. In the first part, we will describe the loop expansion and related works of Brydges-Fröhlich-Seiler. In the second part, we will show how the expansion can be applied to obtain a quantitative diamagnetic inequality. Combined with suitable lattice gauge fixing, the diamagnetic inequality allows us to show moment bounds on the gauge field marginal, uniform in the lattice spacing, when measured in Holder-Besov-type spaces.</div><div class="event_time">16:15 &bull; Université de Genève, Conseil Général 7-9, Room 1-15</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_be"><a class="external" href="https://www.unibe.ch">Universität Bern</a></div><div class="event_type"><a class="external" href="https://www.math.unibe.ch/research/talks/colloquium/index_eng.html">Mathematisches Kolloquium </a></div><br /><div class="event_speaker">PD Dr. Rafael Andrist (AUB, University of Ljubljana)</div><div class="event_title"><a class="external" href="https://www.math.unibe.ch/research/talks/colloquium/index_eng.html">Symplectic holomorphic automorphisms of Calogero-Moser spaces</a> <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />A Calogero-Moser space describes the completed phase space of a system of finitely many particles with a certain Hamiltonian in classical physics. Since the past two decades, these spaces are also an object of ongoing study in pure mathematics. In particular, the Calogero-Moser space of n particles is known to be a smooth complex-affine variety, and to be diffeomorphic to the Hilbert scheme of n points in the affine plane.We establish the symplectic/Hamiltonian holomorphic density property for the Calogero-Moser spaces and describe their group of symplectic holomorphic automorphisms.Joint work with Gaofeng Huang.</div><div class="event_time">17:15 &bull; Universität Bern, Sidlerstrasse 5, 3012 Bern, Lecture Room B6</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, May 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/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.unine.ch/math/home/colloques_et_seminaires/seminaires-de-linstitut.html">Séminaire Groupes et Géométrie </a></div><br /><div class="event_speaker"> Tsviqa Lakrec (Universität Zürich)</div><div class="event_title">Equidistribution of affine random walks on tori and nilmanifolds <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />I will discuss a quantitative equidistribution result for the random walk on a torus arising from the action of the group of affine transformations, and a generalization of these results to some nilmanifolds. This is a joint work with Weikun He and Elon Lindenstrauss.<br>Under the assumption that the Zariski closure of the group generated by the linear part acts strongly irreducibly on R^d we give quantitative estimates (depending only on the linear part of the random walk) for how fast this random walk equidistributes, unless the initial point and the translation part of the affine transformations can be perturbed so that the random walk is trapped in a finite orbit of small cardinality. In particular, this shows that the random walk equidistributes in law to the Haar measure if and only if the random walk is not trapped in a finite orbit. Under a certain condition, we can generalize this theorem to affine and linear random walks on a nilmanifold. This essentially extends the results of Bourgain-Furman-Lindenstrauss-Mozes and He-Saxcé for linear random walks on the torus.</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_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">Prof. Dr. Armin Schikorra (University of Pittsburgh)</div><div class="event_title">Regularity results for n-Laplace systems with antisymmetric potential <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />n-Laplace systems with antisymmetric potential are known to governgeometric equations such as n-harmonic maps between manifolds andgeneralized prescribed H-surface equations. Due to the nonlinearity ofthe leading order n-Laplace and the criticality of the equation theyare very difficult to treat.I will discuss some progress we obtained, combining stability methodsby Iwaniec and nonlinear potential theory for vectorial equations byKuusi-Mingione.Joint work with Dorian Martino</div><div class="event_time">14:00 &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/daco-seminar">DACO Seminar</a></div><br /><div class="event_speaker"><a class="external" href="https://sites.google.com/site/danielbartlmath/">Dr. Daniel  Bartl (University of Vienna, Austria)</a></div><div class="event_title">On high dimensional Dvoretzky–Kiefer–Wolfowitz type inequalities <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The DKW inequality is a non-asymptotic, high probability estimate on the L_\\infty distance between the distribution function of a real-valued random variable and its empirical (random) counterpart. Little was known on generalisations of that inequality to high dimensions, where instead of a single random variable one is interested in the behaviour of empirical distribution functions of a family of marginals of a random vector. Based on chaining methods, we show that the behaviour of various notions of distance (including the L_\\infty one) between the empirical and actual distributions of marginals in the given family can be fully characterised in terms of some (rather surprising) intrinsic complexity parameter of the family.Based on joint work with Shahar Mendelson.</div><div class="event_time">14:15 &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_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">Prof. Dr. Stefan  Czimek (Universität Leipzig)</div><div class="event_title">Obstruction-free gluing for the Einstein equations <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We present a new approach to the gluing problem in General Relativity, that is, the problem of matching two solutions of the Einstein equations along a spacelike or characteristic (null) hypersurface. In contrast to previous constructions, the new perspective actively utilizes the nonlinearity of the constraint equations. As a result, we are able to remove the 10-dimensional spaces of obstructions to gluing present in the literature. As application, we show that any asymptotically flat spacelike initial data set can be glued to Schwarzschild initial data of sufficiently large mass. This is joint work with I. Rodnianski.</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_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"> Loïs Faisant (Université Grenoble Alpes)</div><div class="event_title">Motivic distribution of rational curves <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In diophantine geometry, the Batyrev-Manin-Peyre conjecture originally concerns rational points on Fano varieties. It describes the asymptotic behaviour of the number of rational points of bounded height, when the bound becomes arbitrary large. <br>A geometric analogue of this conjecture deals with the asymptotic behaviour of the moduli space of rational curves on a complex Fano variety, when the « degree » of the curves « goes to infinity ». Various examples support the claim that, after renormalisation in a relevant ring of motivic integration, the class of this moduli space may converge to a constant which has an interpretation as a motivic Euler product. <br>In this talk, we will state this motivic version of the Batyrev-Manin-Peyre conjecture and give some examples for which it is known to hold : projective space, more generally toric varieties, and equivariant compactifications of vector spaces. In a second part we will introduce the notion of equidistribution of curves and show that it opens a path to new types of results. </div><div class="event_time">15:15 &bull; EPF Lausanne, Salle MA A30</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"> Nezhla Aghaee (University Odense & Université de Genève)</div><div class="event_title">Combinatorial Quantisation of Super Chern Simons theory GL <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Chern-Simons theories with gauge supergroups appear naturally in string theory and they possess interesting applications in mathematics, e.g. for the construction of knot and link invariants In this talk we explain the combinatorial quantization of Chern- Simons theories and also the GL(1|1) generalization of it, for punctured Riemann surfaces of arbitrary genus. We construct the algebra of observables, and study their representations and applications to the construction of 3-manifold invariants. This work has also an application to Topological Phases of Matter.</div><div class="event_time">16:15 &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.epfl.ch/labs/mathicse/">Computational Science and Engineering </a></div><br /><div class="event_speaker"> Maryam Kamgarpour (EPF Lausanne)</div><div class="event_title">Quantum CLearning equilibria in games with zeroth-order informationomputing for Numerical Simulation <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />I address the question of learning equilibria in convex and non-convex games under zeroth-order information. In the convex setting, I will present our learning algorithm for monotone games that leverages estimation of game pseudo-gradient. I discuss extensions of the approach to a broader class of games as well as its convergence rates. In the non-convex setting, I will present our no-regret algorithm that leverages probabilistic estimation of a players\' cost function. I will compare the regret rate of the algorithm with the state-of-the-art and discuss our extensions to multi agent reinforcement learning.</div><div class="event_time">16:15 &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://uzh.ch">Universit&auml;t Z&uuml;rich</a></div><div class="event_type"><a class="external" href="https://math.ethz.ch/s/zurich-colloquium-in-mathematics">Zurich Colloquium in Mathematics</a></div><br /><div class="event_speaker"> Sylvia Serfaty (Courant Institute of Mathematical Sciences)</div><div class="event_title">Systems of points with Coulomb interactions <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Large ensembles of points with Coulomb interactions arise in various settings of condensed matter physics, classical and quantum mechanics, statistical mechanics, random matrices and even approximation theory, and they give rise to a variety of questions pertaining to analysis, Partial Differential Equations and probability. We will first review these motivations, then present the \'\'mean-field\'\' derivation of effective models and equations describing the system at the macroscopic scale. We then explain how to analyze the next order behavior, giving information on the configurations at the microscopic level and connecting with crystallization questions,and finish with the description of the effect of temperature.</div><div class="event_time">16:30 &bull; UZH Zentrum, Building KO2, Room F 150</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Wednesday, May 17      </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"> Denis Marti (Université de Fribourg)</div><div class="event_title">On Gromov’s systolic inequality <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Gromov’s systolic inequality first appeared in his seminal paper "Filling Riemannian manifolds". For a closed aspherical Riemannian manifold, the inequality bounds the systole, the smallest length of a noncontractible curve, in terms of the volume of the manifold. The inequality generalizes Loewner’s result for the two-dimensional torus from the 1940s, and marks a starting point for many new developments in systolic and quantitative geometry.<br>In this introductory talk, we first give an overview of Gromov’s proofof the systolic inequality. Then we discuss some recent developments in this area.</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_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/studium/mathematik/doktorat/bernoullis-tafelrunde">Bernoullis Tafelrunde</a></div><br /><div class="event_speaker"> Elena Sammarco (University Roma 3)</div><div class="event_title">A new divisor in the moduli space of cubic fourfolds <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />One of the main open problems of Birational Geometry is to determine the ratio-nality of the cubic hypersurfaces in P5, the so-called cubic fourfolds: to date thereare few explicit results and several conjectures, but no universal criteria. After anoverview of the state of the art of the problem on the complex &#8192;eld C, we presenta new geometric construction of a divisor in the moduli space of cubic fourfoldswhich could represent a signi&#8192;cant contribution in this general discussion.</div><div class="event_time">12:15 &bull; Universität Basel, Spiegelgasse 5, SR 05.002</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/analysis/analysis-seminar">Analysis Seminar</a></div><br /><div class="event_speaker"> Matthew Novack (Purdue University)</div><div class="event_title">The strong Onsager conjecture <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The phenomenon of anomalous dissipation in turbulence predicts the existence of solutions to the incompressible Euler equations that enjoy regularity consistent with Kolmogorov’s 4/5 law and satisfy a local energy inequality. The "strong Onsager conjecture" asserts that such solutions do indeed exist. In this talk, we will discuss the background and motivation behind the strong Onsager conjecture.  In addition, we outline a construction of solutions with regularity (nearly) consistent with the 4/5 law, thereby proving the conjecture in the natural L^3 scale of Besov spaces.  This is based on joint work with Hyunju Kwon and Vikram Giri.</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://uzh.ch">Universit&auml;t Z&uuml;rich</a></div><div class="event_type"><a class="external" href="https://math.ethz.ch/sam/news-and-events/zhacm-colloquia">Zurich Colloquium in Applied and Computational Mathematics</a></div><br /><div class="event_speaker">Prof. Dr. Stefan Kurz (Bosch Center for Artificial Intelligence and University of Jyväskylä)</div><div class="event_title">Hybrid Modeling: Newton + Kepler = Success (joint work with Barbara Rakitsch and Maja Rudolph) <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The talk will first exemplify Hybrid Modeling, that is combining first-principle based with data-driven models, on a toy example. Next, an approach for formalizing hybrid modeling will be presented, in terms of architectural design patterns. Afterwards, the benefits of Hybrid Modeling will be demonstrated in two applications: (i) data-driven electromagnetic field simulation, where the constitutive law will be directly inferred from data, and (ii) irregular time series, where mathematical structures such as Kálmán filter and stochastic ODEs are integrated within deep neural networks. The talk concludes with some suggestions for research questions.</div><div class="event_time">16:30 &bull; UZH Irchel, Winterthurerstrasse 190, Z&uuml;rich, Building Y27, Room H 35/36</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Thursday, May 18      </div>      <div class="day_content">        <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"> Nick Rome (University of Michigan)</div><div class="event_title">Title T.B.A.</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://math.ethz.ch/s/talks-in-mathematical-physics">Talks in Mathematical Physics</a></div><br /><div class="event_speaker"> Camilo Arias Abad (Universitdad Nacional de Colombia en Medellin)</div><div class="event_title">Singular Chains on Lie groups, the Cartan relations and Chern-Weil theory <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The Lie algebra of vector fields on a manifold acts on differential forms by Lie derivatives and contractions, and these operations are related by the Cartan relations. We will explain an interpretation of these relations from the point of view of Lie theory, and describe how this leads to a categorification of the Chern-Weil homomorphism.For a Lie group G, we consider the space of smooth singular chains C(G), which is a differential graded Hopf algebra. We show that the category of sufficiently local modules over C(G) can be described infinitesimally, as the category of representations of a dg-Lie algebra which is universal for the Cartan relations. If G is compact and simply connected, the equivalence of categories can be promoted to an A-infinity equivalence of dg-categories, which are also A-infinity equivalent to the category of infinity local systems on the classifying space BG. The equivalence can be realized explicitly to provide a categorification of the Chern-Weil homomorphism.The talk is based on joint works with A. Quintero and S. Pineda, and work in progress with M. Rivera and F. Bischoff.</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_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"> Mark Shusterman (Harvard University)</div><div class="event_title"><a class="external" href="https://www.ntwebseminar.org/">Counting Minimally Ramified Global Field Extensions</a> <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Given a finite group G, one is interested in the number of Galois extensions of a global field with Galois group G and bounded discriminant. We consider a refinement of this problem where the discriminant is required to have the smallest possible number of (distinct) prime factors. We will discuss existing results and conjectures over number fields, and present some recent results over function fields. </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_dis"><a class="external" href="https://unidistance.ch">UniDistance Suisse</a></div><div class="event_type"><a class="external" href="https://distanceuniversity.ch/academic-events/mathematics-colloquium/">Mathematics Colloquium </a></div><br /><div class="event_speaker"> Panos Parpas (Imperial College London)</div><div class="event_title"><a class="external" href="https://unidistance.ch/en/event/stochastic-mirror-descent-for-convex-optimization-with-consensus-constraints">Stochastic Mirror Descent for Convex Optimization with Consensus Constraints</a> <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The mirror descent algorithm is known to be effective in applications where it is beneficial to adapt the mirror map to the underlying geometry of the optimization model.<br>However, the effect of mirror maps on the geometry of distributed optimization problems has not been previously addressed. <br>In this talk we will study an exact distributed mirror descent algorithms in continuous-time under additive noise and present the settings that enable linear convergence rates.<br>Our analysis draws motivation from the augmented Lagrangian and its relation to gradient tracking. <br>To further explore the benefits of mirror maps in a distributed setting we present a preconditioned variant of our algorithm with an additional mirror map over the Lagrangian dual variables. This allows our method to adapt to the geometry of the consensus manifold and leads to faster convergence. <br>We illustrate the performance of the algorithms in convex settings both with and without constraints.<br>This is joint work with: Anastasia Borovykh, Nikolas Kantas,  and  Grigorios A. Pavliotis.</div><div class="event_time">17:00 &bull; UniDistance Suisse, Zoom Seminar</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Friday, May 19      </div>      <div class="day_content">        <div class="day_content_item no_event">        No events scheduled today!        </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>';