Thursdays at 9:15
CM 106
Program
Date  Title  Speaker 

19.09.14  On detection theorems in representation theory and generalized equivariant cohomology 
Justin Noel Regensburg 
26.09.14 MA 10 
On the algebraic EHP sequence  Nguyen The Cuong Paris XIII 
10.10.14  A cellular version of BlakersMassey  Kay Werndli EPFL 
17.10.14  A homotopy theory for diffeological spaces  Enxin Wu Vienna 
31.10.14  A loopingdelooping adjunction for spaces  Martina Rovelli EPFL 
07.11.14  Profinite completion of operads and the GrothendieckTeichmüller group  Geoffroy Horel Münster 
14.11.14  Group spectra and twisting structures  Marc Stephan EPFL 
21.11.14  Cosimplicial models for spaces of embeddings  Paul Arnaud Songhafouo Tsopméné Université catholique de Louvain 
28.11.14  Cellular properties of nilpotent spaces  Emmanuel Farjoun Hebrew University 
05.12.14  Algebraic realization problem for equivariant complex vector bundles over the 2sphere  Jean Verrette Hawaii 
12.12.14  Deformation theory of the little ncubes operads and graph complexes  Thomas Willwacher Universität Zürich 
19.02.15  An algebraic model for rational SO(3) spectra  Magdalena Kedziorek EPFL 
26.02.15  Mapping class groups of surfaces  Nóra Szoke EPFL 
05, 12, 19, and 26.03.15  PreTalbot working group  Various EPFL 
23.04.15  Rigidity phenomena for mapping class groups  Javier Aramayona Toulouse 
10.06.15 10h15 MA 12 

Ran Levi Aberdeen 
(See also the program of the topology seminar in 2011/12, 2010/11, 2009/10, 2008/09, 2007/08, 2006/07, and 2005/06.)
Abstracts
Noel: Let G be a finite group. Artin’s theorem says that we can recover the complex representation ring of G from the representations of the cyclic subgroups of G up to torsion, or additive nilpotence. Quillen’s Fisomorphism theorem says that we can recover the modp cohomology of G from the modp cohomology of the elementary abelian psubgroups of G up to multiplicative nilpotence. Both of these detection theorems can be restated as results in equivariant stable homotopy theory.
We construct and apply a general framework for proving analogues of these theorems in this context. As special cases we recover the above theorems as well as analogues for integral cohomology (due to Carlson), KO (partially due to Fausk), ko, complex oriented theories (partially due to HopkinsKuhnRavenel), the many variants of topological modular forms, L_{n}local spectra, and classical cobordism theories.
This is joint work with Akhil Mathew and Niko Naumann.
Nguyen: One of the most basic problems in homological algebra is to construct explicit injective (projective) resolutions of modules. We are interested in fi