Vorträge des SFB 1442

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folkeri

Mittagsseminar zur Arithmetik: Gheorghe Pupazan (Humboldt-Univ. Berlin): Multivariable ( phi, Gamma)-modules and representations of products of Galois groups

Tuesday, 05.07.2022 14:15 im Raum via Zoom, SRZ 216/217

Mathematik und Informatik

Fontaine´s theory of (\varphi, \Gamma)-modules is a fundamental tool to describe and classify continuous representations of the Galois group. The following talk will present the results from the author's PhD dissertation, where a multivariable version of the category of (\phi, \Gamma)-modules is introduced. More exactly, we focus on étale (\phi, \Gamma)-modules over a multivariable Laurent power series ring over the ring of integers of a given local field. These modules classify the continuous representations of a n-fold product of the absolute Galois group of the local field with coefficients in the ring of integers.



Angelegt am Tuesday, 28.06.2022 10:32 von folkeri
Geändert am Tuesday, 28.06.2022 10:42 von folkeri
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Vorträge des SFB 1442
Oberseminare und sonstige Vorträge
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elke

Xin Li (Glasgow): Groupoids and C*-algebras arising from Garside categories. Oberseminar C*-Algebren.

Tuesday, 05.07.2022 16:15 im Raum SRZ 216/217

Mathematik und Informatik

This talk is about groupoids and C*-algebras generated by left regular representations of certain left cancellative small categories called Garside categories. I will explain these objects and constructions with the help of many concrete example classes. I will also give an overview of structural results for C*-algebras, groupoids and topological full groups arising from Garside categories.



Angelegt am Friday, 03.06.2022 09:23 von elke
Geändert am Friday, 03.06.2022 09:23 von elke
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Oberseminare und sonstige Vorträge
Vorträge des SFB 1442
Veranstaltungen am Mathematischen Institut
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weckerm

Adam Afandi: The ELSV Formula via Localization on Stable Maps, Part II (Research Seminar on Geometry, Algebra and Topology: Moduli Spaces of Complex Curves)

Wednesday, 06.07.2022 16:15 im Raum M3

Mathematik und Informatik



Angelegt am Thursday, 30.06.2022 14:03 von weckerm
Geändert am Thursday, 30.06.2022 14:03 von weckerm
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Vorträge des SFB 1442
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cmruedig

Jonas McCandless (Uni Münster): Polygonic spectra

Wednesday, 06.07.2022 16:30 im Raum SRZ 205

Mathematik und Informatik

The purpose of this talk is to introduce the notion of a polygonic spectrum which is a multi-object version of the notion of a cyclotomic spectrum indexed by the n-polygons rather than the circle. This is designed to capture the structure on topological Hochschild homology of a ring with coefficients in a bimodule. We obtain the polygonic structure on topological Hochschild homology by studying THH as a trace theory on a category of cyclic graphs whose vertices are labelled by rings and whose edges are labelled by bimodules. This provides a convenient formalism for expressing the cyclic invariance of THH and HH. The polygonic structure on THH with coefficients allows us to introduce a version of TR with coefficients. This is joint work with Achim Krause and Thomas Nikolaus.



Angelegt am Monday, 13.06.2022 12:03 von cmruedig
Geändert am Wednesday, 15.06.2022 11:00 von boeckena
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Vorträge des SFB 1442
Oberseminare und sonstige Vorträge