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Algebraic and Arithmetic Geometry @ Bielefeld

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The Bielefeld Algebraic and Arithmetic Geometry Seminar 2019-2020

Welcome to the website of the Bielefeld Algebraic and Arithmetic Geometry Seminar! For more information, please contact the organizers: Eike Lau, Michael Spiess, Jeanine Van Order, Charles Vial, and Thomas Zink.

Talks

Thursday 29 August, 2019
14:00	V2-200	Igor Burban (Paderborn) Morita theorem for non-commutative schemes [Abstract]
Wednesday 9 October, 2019
15:30	V2-210	Johannes Anschütz (Bonn) Prismatic Dieudonne theory [Abstract] With the prismatic site of a p-complete ring Bhatt and Scholze introduced a mixed-characteristic analog of the crystalline site. Using this site we will present the definition of a prismatic Dieudonne functor which, in the interesting class of mod p quasi-syntomic rings, generalizes the classical crystalline Dieudonne functor of Berthelot/Breen/Messing. We will then sketch our main classification result for p-divisibe groups over quasi-syntomic rings and explain how to recover results of Breuil/Kisin/Lau for regular rings of mixed-characteristic.
17:00	V2-210	Eugenia Rosu, MPIM-Bonn Special cycles on orthogonal Shimura varieties [Abstract] Extending on the work of Kudla-Millson and Yuan-Zhang-Zhang, together with Yott we are constructing special cycles for a specific GSpin Shimura variety. We further construct a generating series that has as coefficients the cohomology classes corresponding to the special cycle classes on the GSpin Shimura variety and show the modularity of the generating series in the cohomology group over C.
Wednesday 30 October, 2019
15:30	V2-210	Matthias Schütt (Hanover) TBA [Abstract] TBA
17:00	V2-210	David Hansen, MPIM-Bonn TBA [Abstract]
Wednesday 27 November, 2019
15:30	V2-210	Daniel Huybrechts (Bonn) TBA [Abstract] TBA