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Supersingular Loci of Unitary Shimura Varieties

Connections Workshop: Algebraic Cycles, L-Values, and Euler Systems January 19, 2023 - January 20, 2023

January 20, 2023 (02:00 PM PST - 03:00 PM PST)
Speaker(s): Maria Fox (Oklahoma State University)
Location: SLMath: Online/Virtual
Tags/Keywords
  • Supersingular locus

  • Shimura variety

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Supersingular Loci Of Unitary Shimura Varieties

Abstract

The supersingular locus of a unitary Shimura variety parametrizes supersingular abelian varieties with an action of a quadratic imaginary field, meeting a certain signature condition. In low-dimensional cases these supersingular loci have a particular kind of structure: for example, every irreducible component is isomorphic to a Deligne-Lusztig variety. We’ll consider these low-dimensional cases for motivation, and then see how the structure of the supersingular locus can be very different in general.

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Supersingular Loci Of Unitary Shimura Varieties

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