var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=3"><img src="//www2.math.ethz.ch/smsjs/images/arrow_left.png"/></a></div><div class="do_not_print" id="arrow_right"><a href="?next=5"><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. 5</span>      <span style="float: right; text-align:right; width: 250px;">12.10 - 16.10.2026</span>      <span style="text-align: center; display: block; width: 250px; margin: auto; position: relative;">Autumn Semester 2026</span>    </div>  </div>  <div></div>  <div id="sms_content">    <div class="day">      <div class="day_title">        Monday, October 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/studium/mathematik/doktorat/bernoullis-tafelrunde">Bernoullis Tafelrunde</a></div><br /><div class="event_speaker"> Ben Snodgrass (Universität Freiburg)</div><div class="event_title"><a class="external" href="https://dmi.unibas.ch/de/studium/mathematik/doktorat/bernoullis-tafelrunde/detail/bernoullis-tafelrunde-ben-snodgrass-universitaet-freiburg/">Title T.B.A.</a></div><div class="event_time">12:15 &bull; Universität Basel, Seminarraum 05.002, Spiegelgasse 5</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"> Simon  Douad</div><div class="event_title">Title T.B.A.</div><div class="event_time">14:00 &bull; Université de Genève, Conseil Général 7-9, Room 8-08</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, October 13      </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/seminaire-danalyse-numerique">Séminaire d\'Analyse Numérique </a></div><br /><div class="event_speaker"> Ronald D.  Haynes</div><div class="event_title">Stefan problems and Schwarz Waveform Relaxation <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />During the latter part of the 19th century Josef Stefan studied the problem of ice growth, motivated by empirical data collected during attempts to find the north-west passage - an arctic passage between Europe and Asia. Stefan formulated a model describing how water freezes and melts, and hence how the boundary between the water and ice moves with time. Theoretically and numerically, such “Stefan” problems have received much attention with work intensifying since the 1950s. In this work, I will discuss recent results which apply Schwarz waveform relaxation (SWR) to first, problems with prescribed time dependent domains, and second, to one-phase Stefan problems. If time permits, I will demonstrate a second analysis of SWR which harkens back to one of the first existence results for Stefan problem by Evans in 1951.</div><div class="event_time">14:00 &bull; Université de Genève, Conseil Général 7-9, Room 1-05</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Wednesday, October 14      </div>      <div class="day_content">        <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">Dr. Yuval Yifrach (Universität Zürich)</div><div class="event_title">Title T.B.A.</div><div class="event_time">13:30 &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_zh"><a class="external" href="https://ethz.ch">ETH Z&uuml;rich</a></div><div class="event_type"><a class="external" href="https://math.ethz.ch/s/algebraic-geometry-and-moduli-seminar">Algebraic Geometry and Moduli Seminar</a></div><br /><div class="event_speaker">Dr. Denis Nesterov (ETH Zürich)</div><div class="event_title">Title T.B.A.</div><div class="event_time">13:30 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_zh"><a class="external" href="https://uzh.ch">Universit&auml;t Z&uuml;rich</a></div><div class="event_type"><a class="external" href="https://www.math.uzh.ch/aa/?events">Neuchatel - St.Gallen - Zurich Seminar in Coding Theory and Cryptography</a></div><br /><div class="event_speaker">Adrish Banerjee (Indian Institute of Technology, Kanpur)</div><div class="event_title">Algebraic Design of DNA Codes with Biological and Combinatorial Constraints <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />&lt;p>DNA-based archival storage is vulnerable to synthesis and sequencing errors driven by long homopolymer runs, GC-content imbalance, and secondary-structure formation. At the same time, codeword design must also guard against nonspecific hybridization, captured by the Reversible (R) and Reversible-Complement (RC) constraints. In this talk, we present an algebraic framework that satisfies all of these requirements simultaneously. DNA block sets \\(\\mathcal{A} \\subseteq \\Sigma_{\\text{DNA}}^t\\) are built by an incremental algorithm that admits a candidate block only if no occurrence of it, within any four-block concatenation, creates a disjoint pair of Secondary-Complement/Reverse-Secondary-Complement (SC/RSC) substrings of length \\(\\ell\\); this local, checkable test on 4-fold concatenations suffices to guarantee that arbitrarily long concatenations of \\(\\mathcal{A}\\) remain \\((\\ell + 1)\\)-free-structure. Specializing this construction to \\(t = 2\\), \\(\\ell = 3\\) yields the four-element block set \\(\\mathcal{A}_4 = \\{AC, CA, TC, CT\\}\\), whose concatenations are further shown to be 3-free-homopolymer and exactly GC-balanced. A bijective, distance-preserving map \\(\\psi : \\mathbb{Z}_4 \\to \\mathcal{A}_4\\) then lifts linear codes over \\(\\mathbb{Z}_4\\) into DNA codes, with a simple generator-matrix symmetry condition guaranteeing the R and RC constraints. Using this map, four families are constructed: Modified Simplex DNA codes (Types 1 and 2), Modified Hamming DNA codes, and Reed--Muller-type DNA codes, each with non-vanishing rate or relative minimum distance as the length grows, and several members meeting the quaternary Singleton and Gilbert--Varshamov bounds.&lt;/p></div><div class="event_time">15:15 &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_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"> Amina Abdurrahman (IHES)</div><div class="event_title">Title T.B.A.</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://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. Olaf Steinbach (TU Graz)</div><div class="event_title">Space-time tensor-product finite element methods for parabolic problem <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We study space-time Galerkin--Petrov formulations for parabolic evolutionproblems and their relation to classical implicit time-stepping schemes.Although such schemes are stable in the usual time-stepping sense, theirinterpretation as space-time operator equations may lead to conditionalstability, with constants depending on the relation between temporal andspatial mesh sizes. We revisit this phenomenon for the continuous Galerkinmethod of Aziz and Monk, which yields the Crank--Nicolson scheme in thelowest-order case, and provide a detailed space-time error analysis forsolutions of both high and low regularity. In particular, the space-timeframework allows us to analyze the deteriorated behaviour of classicaltime-stepping methods for nonsmooth initial data. By applying integrationby parts in time, we derive an adjoint space-time formulation thatincorporates the initial condition in a natural variational way. In thelowest-order case, this formulation leads to a Rannacher-type smoothingof the initial data. The theoretical results are complemented bynumerical experiments. Joint work with R. Löscher and M. Reichelt.</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 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/seminar-on-stochastic-processes">Seminar on Stochastic Processes</a></div><br /><div class="event_speaker">Prof. Dr. Marianna Russkikh (University of Notre Dame)</div><div class="event_title">From Dimers to Maximal Surfaces in Minkowski Space R^{2,1} <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />We discuss a class of graph embeddings into Minkowski space R^{2,2} = C^{1,1}, called t-surfaces, which arise in the study of the planar dimer model. A t-surface consists of a (perfect) t-embedding together with its associated origami map. Perfect t-embeddings were recently introduced as a key tool for proving that the gradient of the dimer height function converges to that of the Gaussian Free Field in a canonically associated metric, under suitable technical assumptions. After introducing the notion of a t-embedding, we describe a construction of perfect t-embeddings for regular hexagons of the hexagonal lattice. For which the corresponding t-surfaces converge to space-like maximal surfaces in Minkowski space R^{2,1}. As a consequence, this construction yields a new proof of the convergence of fluctuations of the dimer height function to the Gaussian Free Field in the conformal structure induced by the limiting maximal surface.</div><div class="event_time">17:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Thursday, October 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"> Cristopher Moore (Santa Fe Institute)</div><div class="event_title">Computational complexity and phase transitions</div><div class="event_time">10:15 &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/fim/activities/nachdiplom-lectures">Nachdiplomvorlesung</a></div><br /><div class="event_speaker"> Kaibo Hu (University of Oxford)</div><div class="event_title">Finite Element Tensor Calculus</div><div class="event_time">10:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_la"><a class="external" href="https://www.epfl.ch">EPF Lausanne</a></div><div class="event_type"><a class="external" href="https://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"> Dario Beraldo</div><div class="event_title">Title T.B.A.</div><div class="event_time">13:15 &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://math.ethz.ch/fim/activities/nachdiplom-lectures">Nachdiplomvorlesung</a></div><br /><div class="event_speaker"> Alan Reid (Rice University)</div><div class="event_title">Arithmetic groups and their profinite completions</div><div class="event_time">14:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_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/colloque">Colloque de Mathématiques </a></div><br /><div class="event_speaker"> Ben Worell (University of Oxford)</div><div class="event_title">Algorithmic Problems for Recurrence Sequences <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Recurrence sequences arise across mathematics and theoretical computer science and some of their most basic properties lead to surprisingly difficult algorithmic questions. For example: given a sequence of rational numbers defined by a linear recurrence and initial conditions, can we determine whether the sequence has a zero and/or whether all terms are nonnegative?In this talk, we will survey these and related decision problems, and explain how they are related to topics in program analysis, dynamical systems, and combinatorics. We start with the classical Skolem–Mahler–Lech theorem, which gives a structural description of the zeros of linear recurrence sequences but leaves open the question of effectively determining the zeros.I will discuss the current state of the art on the decidability of such problems, highlighting what is known and salient open questions.Along the way, we will explain how central results from Diophantine geometry and transcendence theory, such as the Subspace Theorem and the analytic subgroup theorem, enter the algorithmic theory of recurrence sequences.</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://k-os.math.ethz.ch">[K-OS] Knot Online Seminar</a></div><br /><div class="event_speaker"> Daniel Kasprowski (University of Southampton)</div><div class="event_title">Stably exotic fillings of 3-manifolds <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />Stably exotic fillings of a 3-manifold Y are 4-manifolds bounding Y that are homeomorphic but not stably diffeomorphic rel. Y. We show that every closed, orientable 3-manifold admits such fillings, as do certain families of nonorientable 3-manifolds. In contrast we show that for a 3-manifold containing a 2-sided RP<sup>2</sup>, any two smooth, homeomorphic fillings are stably diffeomorphic. This is joint work with Patrick Orson, Mark Powell, and Arunima Ray.</div><div class="event_time">16:15 &bull; <a class="external" href="https://ethz.zoom.us/j/62106645974">online</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/talks-in-financial-and-insurance-mathematics">Talks in Financial and Insurance Mathematics</a></div><br /><div class="event_speaker">Prof. Dr. Benjamin Jourdain (École Nationale des Ponts et Chaussées)</div><div class="event_title">Title T.B.A.</div><div class="event_time">17:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Friday, October 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/s/number-theory-seminar">Number Theory Seminar</a></div><br /><div class="event_title">Title TBA: Romain Branchereau</div><div class="event_time">14:15 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>        <div class="day_content_item normal"><div class="event_location uni_zh"><a class="external" href="https://ethz.ch">ETH Z&uuml;rich</a></div><div class="event_type"><a class="external" href="https://math.ethz.ch/s/algebraic-geometry-and-moduli-seminar">Algebraic Geometry and Moduli Seminar</a></div><br /><div class="event_speaker">Dr. Roberto Fringuelli (University of Pisa)</div><div class="event_title">Title T.B.A.</div><div class="event_time">16:00 &bull; ETH Zentrum, R&auml;mistrasse 101, Z&uuml;rich, Building HG, Room G 43</div>        </div>      </div>    </div>  </div>  <div id="sms_footer">    address: Alessandra Naldi Windler, Departement Mathematik, HG G 51.4, ETH Zurich, Raemistrasse 101, CH-8092 Zurich<br />    email: <a href="mailto:bulletin@math.ch">bulletin@math.ch</a> | phone: +41 44 632 3684 | url: <a href="https://math.ch">https://math.ch</a>    <br /><br /><img src="//www2.math.ethz.ch/smsjs/sms_logo.gif" width="150" alt="SMS/SMG Logo" title="SMS/SMG Logo" />  </div></div>';