Dear Colleagues and Students,
You are cordially invited to the Algebra Seminar organized by the Department of Mathematics.
Speaker: Ergün Yalçın (Bilkent University)
“Some problems related to the cohomology of an EI-category”
Abstract: An EI-category is a category in which every endomorphism is an isomorphism. I will discuss some problems related to the cohomology of an EI-category. One possible approach to these problems is using E-resolutions introduced by Lueck. These resolutions give a spectral sequence for ext-groups over an EI-category, which can be used to explain obstructions for the existence of solutions to the problems that we are interested in. We show that a version of Lueck’s spectral sequence also works for source free EI-categories, in particular, it works for a fusion system.
Date: Monday, February 25, 2019
Place: Mathematics Seminar Room, SA – 141