var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=-30"><img src="//www2.math.ethz.ch/smsjs/images/arrow_left.png"/></a></div><div class="do_not_print" id="arrow_right"><a href="?next=-28"><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. 3</span>      <span style="float: right; text-align:right; width: 250px;">30.9 - 4.10.2024</span>      <span style="text-align: center; display: block; width: 250px; margin: auto; position: relative;">Autumn Semester 2024</span>    </div>  </div>  <div></div>  <div id="sms_content">    <div class="day">      <div class="day_title">        Monday, September 30      </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 Mrowka (Massachusetts Institute of Technology)</div><div class="event_title">Floer homology of three manifolds and applications to low dimensional topology <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Floer homology and the related invariants of 4-manifolds has given us deep insight in smooth differential topology in dimensions 3 and particularly 4. The theory has yielded insights like existence of exotic differentiable structures on 4 dimensional euclidean space, complex curves minimize genus in complex projective space, killing the Hauptvermuntung, there even appear to be connection to the 4 color map theorem. This course will build up Floer homology of three manifolds from scratch. The focus will be on Instanton Floer homology but we will mention other versions and develop applications as the course goes on.</div><div class="event_time">10:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 19.2</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_zh"><a class="external" href="https://ethz.ch">ETH Z&uuml;rich</a></div><div class="event_type"><a class="external" href="https://math.ethz.ch/s/symplectic-geometry-seminar">Symplectic Geometry Seminar</a></div><br /><div class="event_speaker"> Amanda Hirschi (Sorbonne University, Paris)</div><div class="event_title">Open Gromov-Witten invariants in genus zero <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In this talk, I will discuss work in progress, joint with Kai Hugtenburg, on defining open Gromov-Witten invariants (in genus zero) for embedded relatively spin Lagrangians in general closed symplectic manifolds. Our definition rests on the construction of a global Kuranishi chart for the relevant moduli spaces and is an invariant of the almost complex structure. We prove a relation between the invariants of Lagrangians related a Lagrangian cobordism. Time permitting, I will also discuss some results in higher genus.</div><div class="event_time">15:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 19.1 + Note special room!</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. Joao Ramos (EPFL)</div><div class="event_title"><a class="external" href="https://www.math.unibe.ch/research/talks/colloquium/index_eng.html">Beyond Heisenberg: modern perspectives on Fourier uncertainty</a> <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The classical Heisenberg uncertainty principle establishes a fundamental limit on the simultaneous localization of a function in both space and frequency, with far-reaching implications in signal processing, quantum physics, and information theory. While this classical result remains as important as ever, recent breakthroughs show that the Heisenberg estimate is only the beginning.In this talk, we shall use the classical uncertainty framework as a platform to explore recent developments in the field, including but not limited to Viazovska’s breakthrough solution to the sphere-packing problem in dimensions 8 and 24 and its connections to uncertainty principles and the emerging theory of discrete Fourier uniqueness pairs, with a view towards new challenges in the field.</div><div class="event_time">17:15 &bull; Universität Bern, Sidlerstrasse 5, 3012 Bern, Room 228</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, October 1      </div>      <div class="day_content">        <div class="day_content_item normal"><div class="event_location uni_ge"><a class="external" href="https://unige.ch">Université de Genève</a></div><div class="event_type"><a class="external" href="https://www.unige.ch/math/annonces/groupes-geometrie">Groupes et Géométrie </a></div><br /><div class="event_speaker"> Ivan  Babenko  (Université de Montpellier et Université de Moscou)</div><div class="event_title">Une vision comparative de l\'entropie volumique pour les groupes de présentation finie <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Après un court aperçu historique nous introduirons l\'entropie volumique pour les polyèdres simpliciaux. Ensuite nous allons analyser deux pistes possibles pour généraliser cette notion pour les groupes de présentation finie. Cette entropie (quelque soit la piste choisie pour la définition) diffère de l\'entropie algébrique connue depuis longtemps, et tient aussi en compte les relations du groupe.  </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. Guy David (Université de Paris Sud (Orsay))</div><div class="event_title">Absolute continuity of the Robin harmonic measure on irregular domains <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />This will describe joint work with Decio, Engelstein, Mayboroda, Michetti, with help of Filoche. The main question is the boundary behavior of harmonic functions on a domain in Euclidean space, subject to a Robin condition on the boundary $\\frac{\\partial u}{\\partial n} + a u = f$, where $a > 0$ is a positive parameter and $f$ is the data, and measured by the Robin analogue of the harmonic measure on the boundary. For the Dirichlet condition $u = f$ on the boundary, we get the usual harmonic measure and it is known that its absolute continuity with respect to surface measure is a subtle issue. For the Robin condition, it turns out that the situation is much simpler, even on domains with a fractal boundary.</div><div class="event_time">15:30 &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://www.unige.ch/math/seminaires/lie-sem/">Lie groups and moduli spaces </a></div><br /><div class="event_speaker"> Maxim  Grigoriev (Mons)</div><div class="event_title">Gauge PDEs on manifolds with boundaries and asymptotic symmetries <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We propose a framework to study local gauge theories on manifolds with boundaries and their asymptotic symmetries, which is based on representing them as so-called gauge PDEs. These objects extend the conventional BV-AKSZ sigma-models to the case of not necessarily topological and diffeomorphism invariant systems and are known to behave well when restricted to submanifolds and boundaries. We introduce the notion of gauge PDE with boundaries, which takes into account generic boundary conditions, and apply the framework to asymptotically-AdS (flat) gravity. In so doing, we start with a suitable representation of gravity as a gauge PDE with boundaries, which implements the Penrose description of asymptotically simple spacetimes. We then derive the minimal model of the gauge PDE induced on the boundary and observe that it provides the Cartan (frame-like) description of the conformal (Carollian) structure on the boundary. Furthermore, imposing a version of the familiar boundary conditions in the induced boundary gauge PDE, leads to the conventional conformal (BMS) algebra of asymptotic symmetries.</div><div class="event_time">15:30 &bull; Université de Genève, Conseil Général 7-9, Room 1-07</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Wednesday, October 2      </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"> Jonathan Gruber (Erlangen)</div><div class="event_title">Centers and centralizers in (double) affine Hecke algebras. <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The affine Hecke algebra and its center are important objects of      study in combinatorial, geometric and categorical representation      theory. In this talk, I will discuss a new commutative subalgebra of the affine Hecke algebra of type A, which arises from a centralizer construction in the double affine Hecke algebra. This subalgebra contains the center, and it admits a canonical basis akin to the Kazhdan-Lusztig basis of the affine Hecke algebra. I will explain how the canonical basis can be used as a tool to compute composition multiplicities in Gaitsgory\'s central sheaves on affine flag manifolds.</div><div class="event_time">10:15 &bull; EPF Lausanne, CM 1 517</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/cmgr/cmgr/geometry-seminar">Geometry Seminar</a></div><br /><div class="event_speaker"> Mathias  Braun (EPFL)</div><div class="event_title"><a class="external" href="https://memento.epfl.ch/event/an-elliptic-perspective-on-the-d-alembert-operator/">An elliptic perspective on the d\'Alembert operator from general relativity</a> <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We present a distributional notion of d\'Alembertian of Lorentz distance functions in spacetimes which may be smooth or nonsmooth. We derive comparison estimates and precise representation formulas. This expands on a recent elliptic interpretation of this operator (e.g. enabling us to give a simplified proof of the classical Lorentzian splitting theorem); even in the Lorentzian case, our results seem to pioneer its interpretation across the timelike cut locus. Two central ingredients our work unifies are the localization paradigm of Cavalletti-Mondino and our recent Lorentzian Sobolev calculus. Partly in collaboration with Robert McCann (University of Toronto), Nicola Gigli, Felix Rott (SISSA Trieste), Clemens Sämann (University of Oxford), Argam Ohanyan, Tobias Beran, Matteo Calisti (University of Vienna).</div><div class="event_time">11:15 &bull; <a class="external" href="https://plan.epfl.ch/?room==CH%20B3%2031">EPF Lausanne, CH B3 31</a></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/algebraic-geometry-and-moduli-seminar">Algebraic Geometry and Moduli Seminar</a></div><br /><div class="event_speaker"> Jeremy Feusi (ETH Zürich)</div><div class="event_title">Complex abelian varieties and their moduli II <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Toroidal compactifications and their cone stacks</div><div class="event_time">13:30 &bull; UZH Irchel</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/mat760">Ergodic theory and dynamical systems seminar</a></div><br /><div class="event_speaker">Prof. Dr. Roman Sauer (Karlsruhe Institute for Technology)</div><div class="event_title">The Kazhdan property donates an extra dimension <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />The waist inequality for the sphere by Gromov is wonderful result of geometric measure theory. Formulated appropriately for families of spaces, a (uniform) waist inequality for a family of Riemannian manifolds is the Riemannian analog of higher dimensional expanders. We formulate a conjectural picture for locally symmetric spaces. Finally, we show that the Kazhdan property alone gives rise not only to expanders, which is classical, but also to 2-dimensional expanders. An extra dimension for free! This is joint work with Uri Bader.</div><div class="event_time">13:45 &bull; UZH Irchel, Winterthurerstrasse 190, Z&uuml;rich, Building Y27, Room H 28</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/hessbellwald-lab/seminar/epfl-topology-seminar-fall-2024/">Séminaire de Topologie </a></div><br /><div class="event_speaker"> Lyne Moser (Universität Regensburg)</div><div class="event_title">New methods to construct model categories <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Model categories provide a good environment to do homotopy theory. While weak equivalences are the main players in a model category and encode how two objects should be thought of as being ``the same\'\', the additional data of cofibrations and fibrations typically facilitates computations of homotopy (co)limits and derived functors. However, because of their robust structure, model categories are usually hard to construct. In joint work with Guetta, Sarazola, and Verdugo, we develop new techniques for constructing model structures from given classes of cofibrations, fibrant objects, and weak equivalences between them. The requirement that one only needs to provide a class of weak equivalences between fibrant objects seems more natural in practice as the fibrant objects are often the ``well-behaved\'\' objects and so weak equivalences should only be expected to exhibit a good behavior between these objects. As a straightforward consequence of our result, we obtain a more general version of the usual right-induction theorem along an adjunction, where fibrations and weak equivalences are now only right-induced between fibrant objects. If time permits, I will mention some applications of these new methods.</div><div class="event_time">14:00 &bull; <a class="external" href="https://plan.epfl.ch/?room==CM%201%20517">EPF Lausanne</a></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">Prof. Dr. Sobhan Seyfaddini (ETH Z&uuml;rich, Switzerland)</div><div class="event_title">On the algebraic structure of area preserving homeomorphisms of the sphere</div><div class="event_time">15:30 &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_la"><a class="external" href="https://www.epfl.ch">EPF Lausanne</a></div><div class="event_type"><a class="external" href="https://memento.epfl.ch/event/probability-and-stochastic-analysis-seminar/">Probability (and Stochastic Analysis) Seminar </a></div><br /><div class="event_speaker"> Hao  Shen  (Wisconsin Madison)</div><div class="event_title">Stochastic quantization and large N <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In quantum field theory, large N problem refers to a class of important questions regarding the asymptotic behavior of a model with N field components when N goes to infinity. Through stochastic quantization, one relates the large N problem with singular stochastic PDE and mean field limit theory. By combining ideas from these fields one can prove interesting results regarding the dynamic, the quantum fields, the observables, and so on. In this talk we will focus on the linear sigma model, which is an N-vector Phi4 type quantum field theory. In particular we prove some predictions by physicists such as Wilson, and we discover some new probabilistic descriptions in the large N limit. Based on joint works with Scott Smith, Rongchan Zhu and Xiangchan Zhu.</div><div class="event_time">16:00 &bull; EPF Lausanne, CM 1 517</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/sam/news-and-events/zhacm-colloquia">Zurich Colloquium in Applied and Computational Mathematics</a></div><br /><div class="event_speaker">Prof. Dr. Christiane Helzel (Mathematisches Institut, Heinrich-Heine-Universität Düsseldorf)</div><div class="event_title">Active Flux Methods for Hyperbolic Conservation Laws</div><div class="event_time">16:30 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 19.2</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Thursday, October 3      </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"> Simon Brandhorst</div><div class="event_title">Ramification of maps between moduli spaces of Enriques surfaces <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Barth and Peters showed that a generic complex Enriques surface has exactly 527 isomorphism classes Elliptic fibrations.We show that every Enriques surface has precisely 527 isomorphism classes of elliptic fibrations when counted with multiplicity. Their reducible singular fibers and the multiplicities can be calculated explicitly.The statements hold over any algebraically closed field of characteristic not two.To explain these results, we construct a moduli space of complex elliptic Enriques surfacesand study the ramification behavior of the forgetful map to the moduli space of unpolarized Enriques surfaces.Curiously, the ramification indices of a similar map compute the hyperbolic volume of the rational polyhedralfundamental domain appearing in the Morrison-Kawamata cone conjecture.This is joint with Víctor González-Alonso.</div><div class="event_time">14:15 &bull; EPF Lausanne, CM 1 517</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"> Dustin Clausen Colloquium </div><div class="event_title">Centers and centralizers in (double) affine Hecke algebras. <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />In joint work with Peter Scholze, we have developed a different formalism for describing the kinds of mathematical objects which arise when algebraic and topological structures get mixed (for example, topological vector spaces).  I will present this approach and discuss how it naturally gives rise to new foundations for analytic geometry, allowing much more general types of "spaces" than previously considered.Please register on the following form : https://forms.gle/S9HfFx5w4nDuvQem7</div><div class="event_time">16:00 &bull; EPF Lausanne</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">Prof. Dr. Gunther Uhlmann</div><div class="event_title">Calderon&#039;s Inverse Problem <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Calderon&#039;s inverse problem asks whether one can determine the conductivity of a medium by making voltage and current measurements at the boundary. This question arises in several areas of applications including medical imaging and geophysics. I will report on some of the progress that has been made on this problem since Calderon proposed it in 1980, including recent developments on similar problems for nonlinear equations and nonlocal operators. We will also discuss several open problems.</div><div class="event_time">16:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room F 26.1</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Friday, October 4      </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"> Antoine Bommier (ETH Zürich)</div><div class="event_title">Recursive Preferences, the Value of Life, and Household Finance <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We analyze lifecycle saving using a recursive utility model calibrated to match estimates of the value of a statistical life. The novelty of our approach is that we require preferences to be monotone with respect to first-order stochastic dominance while disentangling risk aversion and the intertemporal elasticity of substitution. We show that, with a positive value of life, risk aversion reduces each of savings, stock market participation, and annuity purchase. Risk averse agents insure against early death by consuming more when young and retaining wealth for bequests. These results contrast with those of previous studies using non-monotonic recursive models.This is joint work with François Le Grand, Cormac O’Dea and Daniel Harenberg.</div><div class="event_time">14:00 &bull; EPF Lausanne, Extranef 126</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"> Sebastian  Herrero (University of Santiago de Chile)</div><div class="event_title">Counting rational points on Hirzebruch-Kleinschmidt varieties. <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />This talk is about asymptotic formulas for the number of rational points of bounded (or large) height on Hirzebruch-Kleinschmidt varieties over global fields. These varieties are realizations of split toric varieties with Picard rank 2, and their explicit models enable computations that go beyond the general expectation of the Manin-Peyre conjecture. This is joint work with Tobías Martínez (University of El Salvador) and Pedro Montero (UTFSM, Chile).</div><div class="event_time">14:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room F 26.1</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"> Long Hu (Univ. of Shandong)</div><div class="event_title">The Minimal Time for the Exact Boundary Controllability of Hyperbolic Systems</div><div class="event_time">14:15 &bull; EPF Lausanne, MA B1 11</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://stat.ethz.ch/events/zukost">ZueKoSt: Seminar on Applied Statistics</a></div><br /><div class="event_speaker"> Samuel  Pawel  (Center for Reproducible Science, UZH)</div><div class="event_title">Meta-scientific perspectives on simulation studies <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Simulation studies are widely used in methodological research fields such as statistics, psychometrics, bioinformatics, ecology, econometrics, or machine learning. They generate artificial data sets under specified mechanisms and compare the performance of data analysis methods under different conditions. Careful design, analysis, and reporting of simulation studies is important because they often provide the basis for data analysis decisions in scientific and medical practice. Problems with the reporting of simulation studies were first described nearly half a century ago. Recent attention to reproducibility issues in the biomedical and social sciences has led to more critical reflection on simulation studies and new proposals for improving them. In this talk, I will provide an overview of these recent meta-scientific developments. I will also discuss how questionable research practices (QRPs), such as cherry-picking of favorable results, can affect the validity of simulation studies. To illustrate this point, I present a simulation study of a novel prediction method with no expected performance gain, and show how easy it is to make the method appear superior to well-established competing methods when QRPs are employed. I also discuss approaches for addressing QRPs, and present a newly developed template for preregistration of simulation studies.References:- Pawel, S., Kook, L., Reeve, K. (2024). Pitfalls and potentials in simulation studies: Questionable research practices in comparative simulation studies allow for spurious claims of superiority of any method. Biometrical Journal. https://doi.org/10.1002/bimj.202200091- Siepe, B.S., Bartos, F., Morris, T.P., Boulesteix, A.-L., Heck, D.W., Pawel, S. (2024). Simulation Studies for Methodological Research in Psychology: A Standardized Template for Planning, Preregistration, and Reporting. Psychological Methods (to appear). https://doi.org/10.31234/osf.io/ufgy6</div><div class="event_time">15:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 19.1</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>';