| Talk_id | Date | Speaker | Title |
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29211
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Wednesday 1/12
4:00 PM
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Preston Wake, MSU
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Eisenstein congruences and class groups of pure fields
- Preston Wake, MSU
- Eisenstein congruences and class groups of pure fields
- 01/12/2022
- 4:00 PM - 5:00 PM
- Online (virtual meeting)
(Virtual Meeting Link)
- Preston Wake (wakepres@msu.edu)
Let p and N be primes and assume N is -1 modulo p. Then the class number of $\mathbf{Q}(N^{1/p})$ is divisible by p. I'll explain how to prove this using congruences between modular forms. This is joint work with Jackie Lang
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29200
|
Wednesday 1/19
4:00 PM
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Yujie Xu, Harvard University
|
Normalization in the integral models of Shimura varieties of Hodge type
- Yujie Xu, Harvard University
- Normalization in the integral models of Shimura varieties of Hodge type
- 01/19/2022
- 4:00 PM - 5:00 PM
- Online (virtual meeting)
(Virtual Meeting Link)
- Georgios Pappas (pappasg@msu.edu)
Shimura varieties are moduli spaces of abelian varieties with extra structures. Over the decades, various mathematicians (e.g. Rapoport, Kottwitz, etc.) have constructed nice integral models of Shimura varieties. In this talk, I will discuss some motivic aspects of integral models of Hodge type constructed by Kisin (resp. Kisin-Pappas). I will talk about my recent work on removing the normalization step in the construction of such integral models, which gives closed embeddings of Hodge type integral models into Siegel integral models. I will also mention an application to toroidal compactifications of such integral models.
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29199
|
Wednesday 1/26
12:40 PM
|
Clément Dupont, Université de Montpellier
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On periods and their Galois theory (note unusual time!)
- Clément Dupont, Université de Montpellier
- On periods and their Galois theory (note unusual time!)
- 01/26/2022
- 12:40 PM - 1:40 PM
- Online (virtual meeting)
(Virtual Meeting Link)
- Preston Wake (wakepres@msu.edu)
I will give a leisurely introduction to the modern study of periods via the cohomology of algebraic varieties and the theory of motives. Many examples will be given, with a particular focus on the idea of a Galois theory of periods that generalizes the classical Galois theory of algebraic numbers. If time allows, I will review work in progress (with Francis Brown, Javier Fresán, and Matija Tapušković) on the Galois theory of algebraic Mellin transforms — or maybe just the beta function.
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29201
|
Wednesday 2/9
4:00 PM
|
Amina Abdurrahman, Princeton University
|
TBA
- Amina Abdurrahman, Princeton University
- TBA
- 02/09/2022
- 4:00 PM - 5:00 PM
- Online (virtual meeting)
- Georgios Pappas (pappasg@msu.edu)
No abstract available.
|
|
29202
|
Wednesday 2/16
4:00 PM
|
Jakub Witaszek, University of Michigan
|
TBA
- Jakub Witaszek, University of Michigan
- TBA
- 02/16/2022
- 4:00 PM - 4:00 PM
- C304 Wells Hall
- Joseph Waldron (waldro51@msu.edu)
Local speaker, in person!
|
|
29223
|
Wednesday 2/23
4:00 PM
|
Alexander Duncan, University of South Carolina
|
TBA
- Alexander Duncan, University of South Carolina
- TBA
- 02/23/2022
- 4:00 PM - 5:00 PM
- Online (virtual meeting)
- Igor Rapinchuk (rapinchu@msu.edu)
No abstract available.
|
|
29224
|
Wednesday 3/9
4:00 PM
|
David Stapleton, University of Michigan
|
TBA
- David Stapleton, University of Michigan
- TBA
- 03/09/2022
- 4:00 PM - 5:00 PM
- C304 Wells Hall
- Laure Flapan (flapanla@msu.edu)
No abstract available.
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