var sms = '<div id="sms_bulletin">  <div id="sms_header">  <div class="do_not_print" id="arrow_left"><a href="?next=-7"><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. 3</span>      <span style="float: right; text-align:right; width: 250px;">15.6 - 19.6.2026</span>      <span style="text-align: center; display: block; width: 250px; margin: auto; position: relative;">Summer Break 2026</span>    </div>  </div>  <div></div>  <div id="sms_content">    <div class="day">      <div class="day_title">        Monday, June 15      </div>      <div class="day_content">        <div class="day_content_item no_event">        No events scheduled today!        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Tuesday, June 16      </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"> Jakub  Löwit  (ISTA)</div><div class="event_title">Equivariant K-theory and trace maps after perfection <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />et X be a variety with a G-action. On one hand, we can consider its equivariant algebraic K-theory. On the other hand, we can study the associated family of fixed points -- this has interesting geometry and its global functions model equivariant Hochschild homology. These two sides compare by the so-called Dennis trace map.  Although ubiquitous in the study of K-theory of rings, this comparison did not receive much attention in the equivariant setup. In the first part of the talk, I will explain this setup and show some simple examples.In the second half of the talk, I will explain how to control the trace map on singular examples in positive characteristic after inverting the Frobenius. It becomes an equivalence in interesting situations. In particular, this is the case for affine Schubert varieties in the perfect affine Grassmannian of GL_n. In a different direction, same techniques can be used to prove non-vanishing results for negative equivariant K-theory of proper toric varieties.</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_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"> Artem  Semidetnov  (UniGE)</div><div class="event_title">The operad associated to a crossed simplicial group <span class="abstract-button do_not_print">abstract</span></div><div class="abstract-text" style="display: none"><strong>Abstract:</strong><br />By the Kan–Thurston theorem, any connected homotopy type is realizable as (BG)+ for a discrete group G. Deep results of Barratt–Priddy–Quillen, Galatius, Madsen–Weiss, and others concretely identify the homotopy types of (BG&#8734;)+ for families such as Gn = &#931;n+1,Bn+1, Aut(Fn),GLn(K). However, these methods do not extend to other natural families, such as the homotopy braids Gn = hBn+1, for which (BhB&#8734;)+ remains unexplored.In this talk I will present an operadic enhancement of the crossed simplicial groups of Loday–Fiedorowicz. To each operadic crossed simplicial group one associates an operad in groupoids, recovering the E&#8734;- and E2-operads in the symmetric and braid cases. The main applications are a generalized bar construction specializing to the classical symmetric and braided variants, and an identification of the associated group-completed monads with Barratt– Priddy–Quillen type spaces—providing a new approach to (BhB&#8734;)+, (B&#931;&#8734;)+, and (BB&#8734;)+.</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, June 17      </div>      <div class="day_content">        <div class="day_content_item no_event">        No events scheduled today!        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Thursday, June 18      </div>      <div class="day_content">        <div class="day_content_item no_event">        No events scheduled today!        </div>      </div>    </div>    <div class="day">      <div class="day_title">        Friday, June 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>';