var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=-12"><img src="//www2.math.ethz.ch/smsjs/images/arrow_left.png"/></a></div><div class="do_not_print" id="arrow_right"><a href="?next=-10"><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;">11.5 - 15.5.2026</span>      <span style="text-align: center; display: block; width: 250px; margin: auto; position: relative;">Spring Semester 2026</span>    </div>  </div>  <div></div>  <div id="sms_content">    <div class="day">      <div class="day_title">        Monday, May 11      </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/symplectic-geometry-seminar">Symplectic Geometry Seminar</a></div><br /><div class="event_speaker"> Beomjun Sohn (RWTH Aachen)</div><div class="event_title">Topological entropy under small area perturbation <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 a new robustness result for the topological entropy of Hamiltonian diffeomorphisms on closed surfaces. Topological entropy is a fundamental measure of orbital complexity in dynamical systems, capturing chaotic behavior through a single non-negative value. We prove that if a Hamiltonian diffeomorphism has positive entropy, then any perturbation supported in a topological disk of sufficiently small area still has positive entropy. The proof relies on a new braid stability result derived from Floer-theoretic braids of fixed points, which can be related to the area of the support. This talk is based on ongiong joint work with Marcelo Alves and Matthias Meiwes.</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"> Erika  Roldan</div><div class="event_title">Topology of random 2-dimensional cubical complexes <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 natural model of random 2-dimensional cubical complexes, built as subcomplexes of the n-dimensional cube by including each square face independently at random. The goal is to understand how topological features emerge as the density of square faces increases. I will describe a sharp phase transition for homology to vanish, in the same spirit as classical threshold phenomena for random graphs and as a cubical analogue of well-known results for random simplicial complexes. Along the way, I will highlight several ways in which the cubical setting behaves differently from its simplicial counterpart, and I will explain what this implies for fundamental group behavior and the relationship between homology vanishing and simple connectivity. I will also discuss, via extremal analysis, regimes in which torsion appears (and how/why this happens).</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_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/sfs/news-and-events/data-science-seminar">ETH-FDS seminar </a></div><br /><div class="event_speaker"> Stefan  Steinerberger (UW Seattle)</div><div class="event_title">Particle Dynamics and Dimensionality Reduction <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Dimensionality reduction, moving data from very high dimensions to intermediate dimensions, is well-established.  It is not too difficult to accurately map n points into ~log(n) dimensions.  The problem becomes a lot more difficult if one insists that the high-dimensional data be embedded into 2 dimensions which is what researchers in the biomedical fields need. Moreover, there are algorithms (most prominently tSNE and UMAP) that "semi-successfully" do this: they tend to work (though they also tend to fail on very simple examples).  An added difficulty is that it is difficult to assess from the output when they work.  I will argue that these algorithms reduce to understanding an attraction-repulsion functional acting on a large number of particles; this viewpoint immediately suggests new ideas and algorithms as well as a few benchmark problems.</div><div class="event_time">17:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room F 3</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">Prof. Dr. Karl Worthmann (TU Illmenau)</div><div class="event_title"><a class="external" href="https://www.math.unibe.ch/research/talks/colloquium/index_eng.html">Data-driven surrogates of the Koopman operator</a> <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Extended dynamic mode decomposition (EDMD), embedded in the Koopman framework, is a widely-applied data-driven technique to predict the evolution of observables along the flow of a nonlinear dynamical system. However, despite its popularity, the error analysis is still fragmentary. First, we provide an analysis of the error resulting from a finite dictionary size (projection) and finite data (estimation). Second, we indicate extensions towards reproducible kernel Hilbert spaces to establish L&#8734;-error bounds using kernel EDMD. Then, we leverage our findings to derive stability guarantees in predictive control despite using data-driven surrogate models in the optimization step.</div><div class="event_time">17:15 &bull; Universität Bern, Sidlerstrasse 5, 3012 Bern, Room B6</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, May 12      </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/algebraische-geometrie/">Seminar Algebra and Geometry</a></div><br /><div class="event_speaker"> Saverio Secci (SISSA)</div><div class="event_title"><a class="external" href="https://dmi.unibas.ch/de/news-events/detail/seminar-algebra-and-geometry-saverio-secci-sissa/">Classification of Fano fourfolds with large anticanonical base locus.</a> <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />A famous theorem of Shokurov states that a general anticanonical divisor of a smooth Fano threefold is a smooth K3 surface. In a joint work with Andreas Höring we proved that for four-dimensional Fano manifolds the behaviour is completely opposite: if the anticanonical base locus is a normal surface, all the anticanonical divisors are singular. In this talk I will present our follow-up result, namely the classification of smooth Fano fourfolds with scheme-theoretic base locus a smooth surface: they form 22 families. I will also mention a result on elliptic Calabi-Yau threefolds that we obtained as a technical step in our study.</div><div class="event_time">10:30 &bull; Universität Basel, Spiegelgasse 5, Seminarraum 05.002</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/groupes-geometrie">Groupes et Géométrie </a></div><br /><div class="event_speaker"> Ariel  Yadin  (Ben-Gurion University)</div><div class="event_title">Metric-functional boundaries of small groups <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 discuss metric-functional boundaries of Cayley graphs.I will present three conjectures, with a resolution of one of them.Namely, I will prove that the finiteness of the metric-functional boundary of some Cayley graph is equivalent to the group being virtually cyclic.Along the way I will introduce the notions, and explain some of the motivation of studying these objects.  This includes obtaining algebraic information about the group from the geometric information provided by the Cayley graph, in order to better understand the possible groups with "small" geometries.</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_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"> Jörg Nick</div><div class="event_title">Regularized dynamical parametric approximation of stiff evolution problems <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Parametric approaches numerically approximate the solution of evolution equations by nonlinear parametrizations u(t) = \\Phi( q (t)) with time-dependent parameters q(t), which are to be determined in the computation. The talk discusses numerical integrators for the resulting evolution problems for the evolving parameters q(t). The primary focus is on tackling the challenges posed by the combination of stiff evolution problems and irregular parametrizations, which typically arise with neural networks, tensor networks, flocks of evolving Gaussians, and in further cases of overparametrization. Regularized parametric versions of classical time stepping schemes for the time integration of the parameters in nonlinear approximations to evolutionary partial differential equations are presented. At each time step, an ill-conditioned nonlinear optimization problem is solved approximately with a few regularized Gauß--Newton iterations. Error bounds for the resulting parametric integrator are shown. Numerical experiments that are designed to show key properties of the proposed parametric integrators are discussed.</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_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. Massimo Sorella (Imperial College London)</div><div class="event_title">Fast dynamo action on the 3-torus for pulsed-diffusions <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />For the passive vector equation, the fast dynamo conjecture predicts exponential-in-time growth of the L^2 norm of the solution under the Lipschitz flow generated by a vector field, at a rate independent of the resistivity. We prove this conjecture for the pulsed diffusion model with a time-periodic stretch-fold-shear (SFS) vector field. Our approach relies on anisotropic Banach spaces adapted to the underlying flow dynamics. In the zero-diffusivity regime, we establish the existence of a distributional eigenfunction of the time-one solution operator corresponding to a discrete eigenvalue of modulus greater than one, and then treat the resistive term as a perturbation in these spaces.</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_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://www.math.uzh.ch/mat075.1">Zurich Graduate Colloquium</a></div><br /><div class="event_speaker">Dr. Vanessa Piccolo (EPFL)</div><div class="event_title">What are... the spectral properties of conjugate kernel random matrices? <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />&lt;div>Random matrix theory provides a useful framework for studying high-dimensional models arising in machine learning. In this talk, I will discuss conjugate kernel, or random features, matrices of the form YY*, with Y=f(WX), where X represents the data, W represents the weights, and f is a nonlinear activation function applied entrywise. Such matrices arise naturally from the feature representation produced by a two-layer neural network, and their spectrum captures important information about the geometry, correlations, and effective dimension of these features.&lt;/div> &lt;div>&nbsp;&lt;/div> &lt;div>The aim of the talk is to give an introduction to the spectral behavior of such nonlinear random matrices. I will begin with an overview of some classical examples from random matrix theory, including Wigner matrices and sample covariance matrices, whose limiting spectra are described by the semicircle and Marchenko-Pastur laws. I will then turn to the effect of the nonlinearity. When both W and X have light-tailed entries, the limiting spectral distribution is well understood and coincides with that of a simpler Gaussian-equivalent model. I will also discuss the regime in which the weights are heavy-tailed while the data remain light-tailed. This setting is motivated by empirical observations of heavy-tailed behavior in trained neural networks. In this case, the spectrum no longer follows the light-tailed universality picture: new terms appear in the moment expansion, leading to different limiting behavior and a richer combinatorial structure.&lt;/div></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 13      </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"> Matteo Tamiozzo</div><div class="event_title">Special geodesics in modular curves <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />I will explain two “special” properties enjoyed by geodesics in the upper half-plane with rational or conjugate real quadratic endpoints. On the one hand, such geodesics are the only bialgebraic curves in the upper half-plane. On the other hand, the images in the complex plane of products of two such geodesics allow to detect (in a sense that I will make precise) special curves. Both properties are analogous to known properties of CM points that I will explain in the first part of the talk.</div><div class="event_time">10:00 &bull; EPF Lausanne, CM 1 517</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"> Eckhard Meinrenken  (Toronto)</div><div class="event_title">Symplectic geometry of projective structures on surfaces with boundary <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Let $\\Sigma$ be a compact, oriented surface with boundary.  In work with Anton Alekseev, we found that the Teichmueller space of  hyperbolic 0-metrics on $\\Sigma$, up to isotopies fixing the boundary,  is naturally a symplectic manifold with a Hamiltonian Virasoro action.In more recent work with Ahmadreza Khazaeipoul, we give a similar construction for the deformation space of convex projective structureswith nondegenerate boundary, and show that it is a Hamiltonian space for the symplectic groupoid integrating the Adler-Gelfand-Dikii Poisson structure. </div><div class="event_time">10:00 &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://www.math.uzh.ch/mat760">Ergodic theory and dynamical systems seminar</a></div><br /><div class="event_speaker">Prof. Dr. Marco Lenci (University of Bologna)</div><div class="event_title">Exact and K decomposition theorems, with application to Lorentz gases <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />&lt;p>&lt;span style="caret-color: #ffffff; color: #000000; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;">Exactness and the K-property (a.k.a. K-mixing) are strong ergodic properties whose significance is that a dynamical system loses all information about its initial conditions, as time flows. These properties were the subject of intense investigation in the second half of the last century, before being somewhat superseded by the stronger Bernoulli property, which was at the time proved for a number of popular systems, including many billiards. But the Bernoulli property can only be formulated for dynamical systems preserving a finite measure, while exactness and the K-property work equally well in infinite-measure contexts, which partly explains a revived interest in them.&lt;/span>&lt;br style="caret-color: #ffffff; color: #ffffff; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-line: none; text-decoration-thickness: auto; text-decoration-style: solid;">&lt;br style="caret-color: #ffffff; color: #ffffff; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-line: none; text-decoration-thickness: auto; text-decoration-style: solid;">&lt;span style="caret-color: #ffffff; color: #000000; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;">I will first present two general theorems on the exact and K decomposition of extensions of dynamical systems. One straightforward application is that, in large generality, a recurrent _periodic_ &ldquo;Lorentz gas&rdquo; whose finite-measure factor (Sinai billiard) is hyperbolic is K-mixing. Here the expression &ldquo;Lorentz gas&rdquo; is intended in a general sense, including virtually all previously studied 2-dimensional periodic Lorentz gases and d-dimensional periodic Lorentz tubes, as well as many d-dimensional periodic Lorentz slabs. (Joint work with Daniele Galli)&lt;/span>&lt;br style="caret-color: #ffffff; color: #ffffff; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-line: none; text-decoration-thickness: auto; text-decoration-style: solid;">&lt;br style="caret-color: #ffffff; color: #ffffff; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; orphans: 2; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: 2; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration-line: none; text-decoration-thickness: auto; text-decoration-style: solid;">&lt;span style="caret-color: #ffffff; color: #000000; font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: 400; letter-spacing: normal; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; word-spacing: 0px; -webkit-text-stroke-width: 0px; text-decoration: none; display: inline !important; float: none;">Later, if time permits, I will present a K decomposition theorem specifically tailored to 2-dimensional uniformly hyperbolic billiards in infinite measure. Its main application is the K-property for a general class of planar _aperiodic_ Lorentz gases. (Work in progress with Giovanni Canestrari)&lt;/span>&lt;/p></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 class="day_content_item normal"><div class="event_location uni_ge"><a class="external" href="https://unige.ch">Université de Genève</a></div><div class="event_type"><a class="external" href="https://sites.google.com/view/pm-seminar/home">Physical Mathematics Seminar</a></div><br /><div class="event_speaker"> Kohei Iwaki</div><div class="event_title">Zamolodchikov-type copnjecture for irregular Heun equations <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The Heun equation is a Fuchsian differential equation on the Riemann sphere with four regular singular points, and it contains an accessory parameter that cannot be determined solely from the local monodromy data. A famous conjecture due to Zamolodchikov states that the large central charge limit of the Virasoro conformal block exists, and that this limit yields the accessory parameter. In this talk, we extend this conjecture to all confluent Heun equations with irregular singularities obtained through confluence procedures, and present supporting computational evidence. More specifically, we investigate the relation between the accessory parameters of irregular Heun equations and the Voros periods arising in exact WKB analysis, and compare them with the conformal blocks (or candidates thereof) derived from bilinear identities by Bonelli—Shchechkin—Tanzini. Our results may be regarded as a generalization of earlier works by Mironov—Morozov, Piatek—Pietrykowski, Lisovyy—Naidiuk and others. This is joint work with Nagoya (Kanazawa University) and Shukuta (The University of Tokyo).</div><div class="event_time">14:30 &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/geometry-seminar">Geometry Seminar</a></div><br /><div class="event_speaker"> Daniela Paiva Peñuela (Universität Basel)</div><div class="event_title">Automorphisms of quartic surfaces and Cremona transformations <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Gizatullin\'s problem consists of determining which automorphisms of a smooth quartic surface S in P^3 arise from birational transformations of P^3. This problem fits into a more general question: to characterize which automorphisms of a smooth hypersurface in projective space are restrictions of projective transformations.This question was completely solved by Matsumura and Monsky (1964), and Chang (1978), except for two cases: that of an elliptic curve in P^2 and that of a quartic surface in P^3. For elliptic curves, it is known that although their automorphisms do not come from projective transformations of P^2, they do arise from birational transformations. Therefore, the only open case corresponds to quartic surfaces in P^3, which we refer to as Gizatullin\'s problem.In this seminar, I will provide a general background on the theory of K3 surfaces and the birational geometry of P^3, and explain how the interplay between these areas can be exploited to address the problem. In particular, I will present a solution to Gizatullin\'s problem in certain specific cases.The results I will present are part of a series of joint works with Carolina Araujo, Ana Quedo, and Sokratis Zikas.</div><div class="event_time">15:30 &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://uzh.ch">Universit&auml;t 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">Prof. Dr. Yan Guo (Brown University)</div><div class="event_title">Gravitational Collapse of Gaseous Stars <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />&lt;p>We review recent progress in the PDE study of gravitational collapse in both Newtonian as well as relativistic contexts.&lt;/p></div><div class="event_time">16:15 &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 14      </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"> Sylvain Crovisier (Université Paris-Saclay)</div><div class="event_title">Ergodic theory of surface diffeomorphisms</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>    </div>    <div class="day">      <div class="day_title">        Friday, May 15      </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"> Tom Hutchcroft (California Institute of Technology (Caltech))</div><div class="event_title">Dimension dependence of critical phenomena in percolation</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>    </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>';