Seminar

U. Haifa Topology & Geometry seminar: Wednesday, June 18, 2012. Speaker: Joost Nuiten (Toulouse). Title: “The infinitesimal tangle hypothesis”.

Author: June 18, 2025

The tangle hypothesis is a variant of the cobordism hypothesis that considers cobordisms embedded in some finite-dimensional Euclidean space (together with framings). Such tangles of codimension k can be organized into an E_k-monoidal d-category, where d is the maximal dimension of the tangles. The tangle hypothesis then asserts that this category…
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Geometry and Topology Seminar, News

U. Haifa Topology & Geometry seminar: Wednesday, Apr. 2, 2025. Speaker: Tom Bachmann (Mainz). Title: “Coalgebras in p-adic homotopy theory”.

Author: April 3, 2025

I will report on joint work with Robert Burklund in which we remove finiteness assumptions from a theorem of Mandell. Specifically, we show that the canonical functor from p-adic,nilpotent spaces to (E∞-) coalgebras over F¯p is fully faithful. Recording:https://us02web.zoom.us/rec/share/qlTnQPOI-W7GyhRTkK3DB5PZdP1WiEgcOsHaZ661TmES9VsoM_pqHWgFji4whSJd.0MWjSTm7kOZ12uaH

Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Wednesday, Mar. 19, 2025. Speaker: Marina Prokhorova (Haifa). Title: “Index theory for unbounded Fredholm operators”.

Author: March 19, 2025

A linear operator on a Hilbert space is called Fredholm if its kernel and cokernel are finitedimensional. As was shown in classical works of Atiyah, J¨anich, and Singer, the space of bounded Fredholm operators represents even K-theory; its subspace consisting…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Wednesday, Nov. 27, 2024. Speaker: Giuseppe Leoncini (Università degli Studi di Milano Statale). Title: “Universal homotopy theories in the enriched context’”.

Author: November 27, 2024

I will put forward a possible generalization of Dugger’s theorem on universal homotopy theories, in enriched homotopy theory, following previous work of Dugger and Shipley for the case of enrichment over Abelian groups. I will discuss what can be done…
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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Tuesday, Apr. 9, 2024. Speaker: Kaif Hilman (Bonn). Title: “Equivariant Poincare duality for finite groups and fixed points methods”.

Author: April 9, 2024

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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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Tuesday, Mar. 5, 2024. Speaker: Surojit Ghosh (IIT Roorkee). Title: “Higher homotopy invariants of diagrams of chain complexes”.

Author: March 5, 2024

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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Geometry and Topology Seminar, Seminar

U. Haifa Topology & Geometry seminar: Tuesday, Jan. 23, 2024. Speaker: Damien Calaque (Montpellier). Title: “Shifted symplectic reduction”.

Author: January 24, 2024

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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Geometry and Topology Seminar, Seminar

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