Generically free representations III: extremely bad characteristic

22 Jan 2018  ·  Skip Garibaldi, Robert M. Guralnick ·

In parts I and II, we determined which faithful irreducible representations $V$ of a simple linear algebraic group $G$ are generically free for Lie($G$), i.e., which $V$ have an open subset consisting of vectors whose stabilizer in Lie($G$) is zero, with some assumptions on the characteristic of the field. This paper settles the remaining cases, which are of a different nature because Lie($G$) has a more complicated structure and there need not exist general dimension bounds of the sort that exist in good characteristic.

PDF Abstract

Categories


Representation Theory Group Theory 20G05 (primary), 17B10 (secondary)