CRC 326 - GAUS

D-elliptic sheaves and the Hasse principle
2025-07-18 09:00 - 11:00 (Europe/Berlin) | Heidelberg, Mathematikon, SR 8 and Zoom, INF 205, Heidelberg, Germany
Global points and the Hasse principle
speaker: Sriram C. Venkata (Heidelberg)

Der syntomische Logarithmus
2025-07-18 13:30 - 14:30 | Heidelberg, Mathematikon, SR A and Livestream
Der syntomische Logarithmus
Matthias Flach (Caltech/USA)
In Gemeinschaftsarbeit mit A. Krause und B. Morin geben wir mit Hilfe von prismatischer Kohomologie eine neue Konstruktion der Bloch-Kato Logarithmusabbildung. Als Anwendung beweisen wir die Vermutung C_{EP} von Fontaine und Perrin-Riou für Tate-Motive über beliebigen lokalen Körpern der Charakteristik null.

Seminar on Arithmetic Geometry
2025-07-18 15:30 - 17:00 | Darmstadt, Room 401 and Zoom, Schlossgartenstraße 7, Darmstadt, 64289, Germany
Abhishek Oswal (University Freiburg): p-adic hyperbolicity of the moduli space of abelian varieties
By a theorem of Borel, any holomorphic map from a complex
algebraic variety to the moduli space of abelian varieties (and more
generally to an arithmetic variety) is in fact algebraic. A key input
is to prove that any holomorphic map from a product of punctured disks
to such an arithmetic variety does not have any essential
singularities. In this talk, I’ll discuss a p-adic analogue of these
results. This is joint work with Ananth Shankar and Xinwen Zhu (with an
appendix by Anand Patel).
Zoom (635 7328 0984, Kenncode: kleinste sechsstellige Primzahl

Workshop Linear Algebraic Groups
2025-07-24 - 2025-07-25 | Darmstadt

Anabelian geometry - Daniel Litt "Arithmetic representations of fundamental groups II"
2025-07-24 14:00 - 17:30 | Heidelberg
14:00 – 15:15 Talk 10: Weight filtration on deformation rings II
15:45 – 17:00 Talk 11: Integral analysis and proof of Frey–Mazur

Conference "Motives and Arithmetic Geometry"
2025-07-28 - 2025-08-01 | Darmstadt

"International Workshop on Automorphic Forms"
2025-09-01 - 2025-09-05 | SwissMAP Research Station, Les Diablerets, Switzerland, Switzerland

tba
2025-09-04 16:00 - 17:00 | Zoom
International Seminar on Automorphic Forms
Ziqi Guo ( Peking University) tba

https://tu-darmstadt.zoom.us/j/68048280736
The password is the first Fourier coefficient of the modular j-function (as digits)

Tame Local Langlands
2025-10-14 14:00 - 15:30 | Darmstadt, Room 401 and Zoom, Schlossgartenstraße 7, Darmstadt, 64289, Germany
Talk 1: The Kottwitz set B(GL_n)
Arieh Zimmerman (Boston College)
Zoom (612 2072 7363, Password: [REDACTED] six digit prime number)

p-adic Simpson correspondence
2025-10-15 14:00 - 18:00 | Frankfurt, Robert-Mayer-Str. 6-8, Raum 309
Talk 0: Ruth Wild (Goethe Universität Frankfurt): Introduction
Talk 1: Benjamin Steklov (Goethe Universität Frankfurt): Rigid and perfectoid spaces
Talk 2: Magnus Carlson (Goethe Universität Frankfurt): v-topology

Konstruktion von Galoisüberlagerungen mithilfe starr-analytischer Verklebung
2025-10-16 09:15 - 10:45 | Heidelberg, MATHEMATIKON, SR 7, INF 205, Heidelberg, 69120, Germany
Talk 1: Einführung
Alexander Schmidt (Universität Heidelberg)

Solid Locally Analytic Representations in Mixed Characteristic
2025-10-17 13:30 - 15:00 | Heidelberg, Mathematikon, SR A and Livestream
Dr. Gal Porat (Einstein Institute of Mathematics, Hebrew University of Jerusalem)
Abstract:
Locally analytic representations of p-adic Lie groups with Q_p coefficients are powerful tools in p-adic Hodge theory and the p-adic Langlands program. This perspective reveals important differential structures, such as the Sen and Casimir operators.
A few years ago, Rodrigues Jacinto and Rodriguez Camargo developed a “solid” version of this theory using the language of condensed mathematics, which provides more robust homological tools (comparison theorems, spectral sequences…) for studying these representations.
This talk will present ongoing work that extends this solid theory to a much broader class of mixed characteristic coefficients, such as F_p((X)) or Z_p[[X]]<p/x>, as well as semilinear representations. I will conclude by exploring how these ideas relate to mixed characteristic phenomena in p-adic Hodge theory and the Langlands program.

"Motives and Higher Categories "
2025-10-20 09:00 - 2025-10-22 13:00 | Mainz, Hilbertraum (05-432)
The workshop will feature 12 talks by the following speakers:

William Balderama
Julius Frank
Niklas Kipp
Ahina Nandy
Lucas Piessevaux
Florian Riedel
Victor Saunier
Robert Szafarczyk
Hari Sudarsan
Swann Tubach
Anneloes Viergever
Sebastian Wolf

Tame Local Langlands
2025-10-21 14:00 - 15:30 | Darmstadt, Room 401 and Zoom, Schlossgartenstraße 7, Darmstadt, 64289, Germany
Talk 2: The Kottwitz set B(G)
Yanik Kleibrink (TU Darmstadt)
Zoom (612 2072 7363, Password: [REDACTED] six digit prime number)

Konstruktion von Galoisüberlagerungen mithilfe starr-analytischer Verklebung
2025-10-23 09:15 - 10:45 | Heidelberg, MATHEMATIKON, SR 7, INF 205, Heidelberg, 69120, Germany
Talk 2: Starr-analytische Räume
Alexander Schmidt (Universität Heidelberg)

Higher algebra
2025-10-23 11:15 - 12:45 | Heidelberg, Mathematikon, SR 8 and Zoom, INF 205, Heidelberg, Germany
Talk 1: From categories to ∞-categories
Marvin Schneider (Universität Heidelberg)

Some cases of cube sum problem
2025-10-24 13:30 - 15:00 | Heidelberg, Mathematikon, SR A and Livestream
Dipramit Majumdar (IIT Madras / Universität Heidelberg)
Abstract: An integer n is said to be a rational cube sum or simply a cube sum if n can be written as a sum of cubes of two rational numbers. For example, 6 = (17/21)^3+ (37/21)^3. A cube-free integer n > 2 is a cube sum if and only if the elliptic curve y^2=x^3-432n^2 has infinitely many solutions over the rational numbers. A recent result of Alpöge-Bhargava-Shnidman-Burungale-Skinner shows that a positive proportion of integers are cube sums and a positive proportion of integers are not.
We will discuss the cube sum problem for some special family of integers. This talk is based on joint works with De, Jha, Mondal, Shingavekar and Sury.

Seminar on Arithmetic Geometry
2025-10-24 15:30 - 17:00 | Darmstadt, Room 401 and Zoom, Schlossgartenstraße 7, Darmstadt, 64289, Germany
Michael Rapoport (University Bonn): Toric schemes and integral models of Shimura varieties
The modular curve with Gamma0(p)$-level structure has a beautiful integral model over BZp, and generalizations of this model to any Shimura variety with p-parahoric level have been constructed in the last 30 years. When passing from Gamma0(p)-level to Gamma1(p)-level, the situation changes drastically. In the talk I will explain a general method that potentially allows to deal with such level structures. The method is based on the construction of torus embeddings of the maximal torus of a reductive group scheme. Joint work with G. Pappas.
Zoom (635 7328 0984, Kenncode: kleinste sechsstellige Primzahl)

Riemann-Hilbert Correspondence in characteristic p
2025-10-27 10:00 - 12:00 | Mainz, Hilbertraum 05-432
Introduction by Tom Bachmann (JGU Mainz)
We will be learning about the Riemann-Hilbert correspondence in characteristic p, relating ètale sheaves and Frobenius modules, following the presentation of Akhil Mathew. The current version of the program can be found at: http://tom-bachmann.com/programm-RH.pdf

Noether-Lefschetz loci in A_g and modularity
2025-10-27 15:15 - 17:45 | Darmstadt
15:15 – 16:15 Riccardo Zuffetti (TU Darmstadt): Introduction to the modularity conjecture
16:45 – 17:45 Mingkuan Zhang (TU Darmstadt): The moduli space of abelian varieties

Konstruktion von Galoisüberlagerungen mithilfe starr-analytischer Verklebung
2025-10-30 09:15 - 10:45 | Heidelberg, MATHEMATIKON, SR 7, INF 205, Heidelberg, 69120, Germany
Talk 3: Proendliche Gruppen
Immanuel Klevesath (Universität Heidelberg)

Higher algebra
2025-10-30 11:15 - 12:45 | Heidelberg, Mathematikon, SR 8 and Zoom, INF 205, Heidelberg, Germany
Talk 2: Basic categorical constructions with ∞-categories
Anna Blanco Cabanillas (Universität Heidelberg)

Riemann-Hilbert correspondence in characteristic p
2025-11-03 10:00 - 12:00 | Mainz, Hilbertraum 05-432
Lorenzo Mantovani (JGU Mainz)
Étale cohomology

International Seminar on Automorphic Forms
2025-11-03 15:00 - 16:00
Talk 1: Modular Heights of Unitary Shimura Varieties
Ziqi Guo (Peking University)
Zoom (680 4828 0736, The password is the first Fourier coefficient of the modular j-function (as digits)).

Tame Local Langlands
2025-11-04 14:00 - 15:30 | Darmstadt, Room 401 and Zoom, Schlossgartenstraße 7, Darmstadt, 64289, Germany
Talk 3: Definition of Isoc_G
Michelle Klemt (TU Darmstadt)
Zoom (612 2072 7363, Password: [REDACTED] six digit prime number)

Konstruktion von Galoisüberlagerungen mithilfe starr-analytischer Verklebung
2025-11-06 09:15 - 10:45 | Heidelberg, MATHEMATIKON, SR 7, INF 205, Heidelberg, 69120, Germany
Talk 4: Verklebung kompatibler Familien von Galoisüberlagerungen
Christian Dahlhausen (Universität Heidelberg)

Higher algebra
2025-11-06 11:15 - 12:45 | Heidelberg, Mathematikon, SR 8 and Zoom, INF 205, Heidelberg, Germany
Talk 3: Interlude: Spectra
Jakob Burgi (Universität Heidelberg)

Seminar on Arithmetic Geometry
2025-11-07 15:30 - 17:00 | Darmstadt, Room 401 and Zoom, Schlossgartenstraße 7, Darmstadt, 64289, Germany
Fei Ren (Bergische Universität Wuppertal): Coherent Six-Functor Formalisms: Pro vs Solid
In the classical theory for coherent sheaves, the only missing piece in the Grothendieck
six-functor formalism picture is j! for an open immersion j. Towards fixing this gap, Deligne
provided a construction of j! by extending the sheaf class to pro sheaves, while Clausen-
Scholze provided another solution by extending the sheaf class to solid modules.
In this talk, I will explain how Deligne’s construction coincides with the Clausen-Scholze construction via a natural functor, whose restriction to the full subcategory of Mittag-Leffler pro-systems is fully faithful.
Zoom (635 7328 0984, Kenncode: kleinste sechsstellige Primzahl)

Riemann-Hilbert correspondence in characteristic p
2025-11-10 10:00 - 12:00 | Mainz, Hilbertraum 05-432
Timon Tausendpfund (JGU Mainz)
Prestable and derived categories

Noether-Lefschetz loci in A_g and modularity
2025-11-10 15:15 - 17:45 | Frankfurt am Main
15:15 – 16:15 Nicole Müller (Goethe Universität Frankfurt): The tautological ring of A_g
16:45 – 17:45 Miguel Prado Godoy (Goethe Universität Frankfurt): The toroidal compactification of A_g and its tautological ring
