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math.AG2022
Unipotent Subgroups of Stabilizers
Phillipe Gille, Robert Guralnick
We consider semi-continuity of certain dimensions on group schemes.
math.AG2022
Azumaya Algebras and Obstructions to Quadratic Pairs over a Scheme
Philippe Gille, Erhard Neher, Cameron Ruether
We investigate quadratic pairs for Azumaya algebras with involutions over a base scheme S as defined by Calm{è}s and Fasel, generalizing the case of quadratic pairs on central simp…