On a "Wonderful" Bruhat-Tits group scheme

Published 22 Jan 2021 in math.RT and math.AG | (2101.09212v2)

Abstract: In this note we make a universal construction of Bruhat-Tits group scheme on wonderful embeddings of adjoint groups in the absolute and relative settings and of adjoint Kac-Moody groups. These have natural classifying properties reflecting the orbit structure on the wonderful embeddings.

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