2 papers
math.RT2026
Jordan-Chevalley decompositions over imperfect fields
Fabian Hebestreit, Manuel Hoff, Werner Hoffmann
We give a classification of Jordan-Chevalley decompositions of an endomorphism of a finite-dimensional vector space over a not necessarily perfect field, i.e. additive decompositio…
math.AG2025
The EKOR-stratification on the Siegel modular variety with parahoric level structure
Manuel Hoff
We study the arithmetic geometry of the reduction modulo of the Siegel modular variety with parahoric level structure. We realize the EKOR-stratification on this variety as the…