Thierry Stulemeijer

collaborators

2 papers

math.GR2019

Semilinear automorphisms of reductive algebraic groups

Thierry Stulemeijer

Let $G$ be a connected reductive algebraic group over a field $k$ . We study the group of semilinear automorphisms Aut( $G \to$ Spec $k$ ) consisting of algebraic automorphisms of…

math.GR2019

Borel density for approximate lattices

Michael Björklund, Tobias Hartnick, Thierry Stulemeijer

We extend classical density theorems of Borel and Dani--Shalom on lattices in semisimple, respectively solvable algebraic groups over local fields to approximate lattices. Our proo…