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Ruth Moufang Lectures 2021

Zoom

This year’s speaker will be Jennifer Balakrishnan with three lectures on rational points on curves. The event will be opened by Andrea Blunck with a lecture on the life and work of Ruth Moufang.

Fabio Bernasconi

Zoom

Fabio Bernasconi (University of Utah)

Log liftability for del Pezzo surfaces and applications to singularities in positive characteristic

Topic discussion

Zoom

Topic discussion for the GAUS-AG of the upcoming semester WS 2021/22

Xuesen Na

Zoom

Xuesen Na (University of Maryland)
Limiting configuration of SU(1,2) Higgs bundles

Workshop Series on Non-Archimedean and Tropical Geometry

Zoom

The Workshop Non-Archimedean and Tropical Geometry, originally planned for Fall 2020, has been converted to a series of smaller virtual (and later hybrid) afternoon workshops to take place biweekly in the Fall of 2021. The first session will take place on Friday, October 1st, 2021. Later sessions, starting on Nov. 12, will take place in a … Continue reading Workshop Series on Non-Archimedean and Tropical Geometry

Free

Workshop Non-Archimedean and Tropical Geometry

Zoom

The Workshop Non-Archimedean and Tropical Geometry, originally planned for Fall 2020, has been converted to a series of smaller virtual (and later hybrid) afternoon workshops to take place biweekly in the Fall of 2021. The first session will take place on Friday, October 1st, 2021. Later sessions, starting on Nov. 12, will take place in a … Continue reading Workshop Non-Archimedean and Tropical Geometry

Free

Grigory Andreychev (Universität Bonn): Descent on Analytic Adic Spaces via Condensed Mathematics

Heidelberg, Mathematikon, SR A and Livestream

In this talk, I am going to explain the main results of my recent preprint (arXiv:2105.12591). The primary goal will be to prove that for every affinoid analytic adic space $X$, pseudocoherent complexes, perfect complexes, and finite projective modules over $\mathcal{O}_X(X)$ form a stack with respect to the analytic topology on $X$. The proof relies on the new approach to analytic geometry developed by Clausen and Scholze by means of condensed mathematics; therefore, I will also explain how to apply their formalism of condensed analytic rings to the study of adic geometry.

Hodge theory of matroids (Session 1)

Zoom

This semester’s topic in our joint research seminar is Hodge theory of matroids. The meetings take place on Zoom on a bi-weekly basis during lecture time, Thursdays 15-18.
Talk 1: Overview of the topic of the seminar. (Martin Ulirsch)
Talk 2: Matroid basics I – cryptomorphisms and examples (Ingmar Metzler)

Thomas Geisser (Rikkyo University Tokyo): Duality for motivic cohomology over local fields and applications to class field theory

Heidelberg, Mathematikon, SR A and Livestream

We give an outline of a (conjectural) construction of cohomology groups for smooth and proper varieties over local fields with values in the derived category of locally compact groups satisfying a Pontryagin duality. For certain weights, we give an ad hoc construction which satisfies such a duality unconditionally. We then explain how this leads to … Continue reading Thomas Geisser (Rikkyo University Tokyo): Duality for motivic cohomology over local fields and applications to class field theory