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DTSTART;VALUE=DATE:20260309
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SUMMARY:Conference "Étale homotopy theory" - A conference on the occasion of Alexander Schmidt's 60th birthday
DESCRIPTION:
URL:https://crc326gaus.de/event/conference-etale-homotopy-theory-a-conference-on-the-occasion-of-alexander-schmidts-60th-birthday/
LOCATION:Heidelberg\, Mathematikon\, SR tba
CATEGORIES:GAUS-Workshop
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DTSTART;TZID=Europe/Berlin:20260325T150000
DTEND;TZID=Europe/Berlin:20260325T173000
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CREATED:20260312T151618Z
LAST-MODIFIED:20260319T091532Z
UID:12824-1774450800-1774459800@crc326gaus.de
SUMMARY:Oberseminar Algebra und Geometrie
DESCRIPTION:15:00 Uhr: Sara Sajadi (Universität Toronto): A Unified Finiteness Theorem For Curves \nAbstract: This talk presents a unified framework for finiteness results concerning arithmetic points on algebraic curves\, exploring the analogy between number fields and function fields. The number field setting\, joint work with F. Janbazi\, generalizes and extends classical results of Birch–Merriman\, Siegel\, and Faltings. We prove that the set of Galois-conjugate points on a smooth projective curve with good reduction outside a fixed finite set of places is finite\, when considered up to the action of the automorphism group of a proper integral model. Motivated by this\, we consider the function field analogue\, involving a smooth and proper family of curves over an affine curve defined over a finite field. In this setting\, we show that for a fixed degree\, there are only finitely many étale relative divisors over the base\, up to the action of the family’s automorphism group (and including the Frobenius in the isotrivial case). Together\, these results illustrate both the parallels and distinctions between the two arithmetic settings\, contributing to a broader unifying perspective on finiteness. \n16:30 Uhr: Benjamin Steklov (Goethe Universität): Fermat’s Last Theorem for Selmer sections \nAbstract: Wiles famously proved Fermat’s Last Theorem\, which states that the (affine) Fermat curve of exponent p>2 has no rational points. Grothendieck’s section conjecture predicts that for a hyperbolic curve over a number field\, rational points are controlled by sections of a natural exact sequence of étale fundamental groups. Combined with Fermat’s Last Theorem\, this suggests that the corresponding sequence for the Fermat curve admits only sections arising from cusps. In this talk\, we explain how to prove that this prediction holds for Selmer sections of the Fermat curve.
URL:https://crc326gaus.de/event/oberseminar-algebra-und-geometrie-5/
LOCATION:Frankfurt\, Robert-Mayer-Str. 10\, Raum 711 groß
CATEGORIES:GAUS-Seminar
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