4 papers
math.NT2026
EKOR and BT stratifications for basic unramified Rapoport-Zink spaces
Joseph Muller
In this paper, we establish the relation between the Ekedahl-Kottwitz-Oort-Rapoport stratification and the Bruhat-Tits stratification on basic unramified Rapop…
math.NT2026
The Bruhat-Tits stratification for basic unramified Rapoport-Zink spaces at arbitrary parahoric level
Joseph Muller
In this paper, we describe a stratification on the reduced special fiber of the basic unramified unitary Rapoport-Zink space of signature and at arbitrary parahoric level…
math.NT2026
Nearby cycles on the local model for the PEL Shimura variety over a ramified prime
Joseph Muller
In this paper, we compute the cohomology sheaves of the -adic nearby cycles on the local model of the PEL Shimura variety over a ramified prime, with lev…
math.RT2026
Twisted Gelfand-Ponomarev modules
Joseph Muller, Chia-Fu Yu
In this expository paper, given a field and two automorphisms , we give a self-contained proof of the classification of finite dimensional -vector…