Seminar

In this talk, I will introduce the notion of Poincar´e duality spaces in the equivariantsetting for finite groups and discuss an approach relating equivariant Poincar´e duality withPoincar´e duality on the fixed points. Time permitting, I will also indicate how one…
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While encoding the homotopy invariants in a model category, one approach (due to Heller and Grothendieck) is to determine certain higher invariants in the homotopy categories of all small diagram categories. In this talk, we provide an explicit approach to…
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This talk will be on Zoom:https://us02web.zoom.us/j/83920631646?pwd=cWZRWjllZWEvdjVSNVhTdUxMMGlwUT09 I will start explaining that Hamiltonian reduction can be understood as a particular instance of Lagrangian intersections, within the framework of shifted symplectic geometry. One can see this first part of the talk as…
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Homotopy localizations with respect to arbitrary (possibly proper) classes of maps are known to existin suitably structured model categories assuming the validity of Vopenka’s principle from set theory.Through recent progress in large cardinal theory, we prove that the existence of…
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Given a commutative ring or ring spectrum, there is a functor from finite sets to commutative rings sending a set to the tensor product of copies of the ring (or ring spectrum) indexed by that set.  The Loday construction extends…
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Time: 11:00 AM Recording:https://us02web.zoom.us/rec/share/9f42mPT6f_DrAb7PSelgFJxj4VF5XyBFR_w9Q_1pmd0l7N8vBrZA5s9tHsXNyc-I.WUIy_fbLn_vZCL1l Abstract: In the first part of this talk I will discuss a result about the existence of compactly supported versions of cohomology theories of varieties. In the second part of the talk I will discuss a…
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