215 citations · 807 across the 39 of their papers we have counts for
4 papers · 1 filter
The local structure theorem for real spherical varieties
Friedrich Knop, Bernhard Krötz, Henrik Schlichtkrull
Let be an algebraic real reductive group and a real spherical -variety, that is, it admits an open orbit for a minimal parabolic subgroup . We prove a local structure…
On the W-action on B-sheets in positive characteristic
Friedrich Knop, Guido Pezzini
Let G be a connected reductive group defined over an algebraically closed ground field of characteristic p, let B be a Borel subgroup of G, and let X be a G-variety. The first name…
Spherical subgroups in simple algebraic groups
Friedrich Knop, Gerhard Roehrle
Let be a simple algebraic group. A closed subgroup of is called spherical provided it has a dense orbit on the flag variety of . Reductive spherical subgroups…
Localization of spherical varieties
Friedrich Knop
We prove some fundamental structural results for spherical varieties in arbitrary characteristic. In particular, we study Luna's two types of localization and use it to analyze sph…