David I. Stewart

activity

20092022

most citedRigid orbits and sheets in reductive Lie algebras over fields of prime characteristic

19 citations · 63 across the 19 of their papers we have counts for

collaborators

Showing 2021Show all

3 papers · 1 filter

math.GR2021

On the exponent of geometric unipotent radicals of pseudo-reductive groups

Falk Bannuscher, Maike Gruchot, David I. Stewart

Let $k^{'} / k$ be a finite purely inseparable field extension and let $G^{'}$ be a reductive $k^{'}$ -group. We denote by $G = R_{k^{'} / k} (G^{'})$ the Weil restriction of $G^{'}$ across $k^{'} / k$ , a pseud…

math.GR2021

Representatives for unipotent classes and nilpotent orbits

Mikko Korhonen, David I. Stewart, Adam R. Thomas

Let $G$ be a simple algebraic group over an algebraically closed field $k$ of characteristic $p$ . The classification of the conjugacy classes of unipotent elements of $G (k)$ and ni…

math.GR2021★ 1 cited

A New Maximal Subgroup of $E_{8}$ in Characteristic $3$

David A. Craven, David I. Stewart, Adam R. Thomas

We prove the existence and uniqueness of a new maximal subgroup of the algebraic group of type $E_{8}$ in characteristic $3$ . This has type $F_{4}$ , and was missing from previous lists…

On the exponent of geometric unipotent radicals of pseudo-reductive groups

Representatives for unipotent classes and nilpotent orbits

A New Maximal Subgroup of E8​ in Characteristic 3

A New Maximal Subgroup of $E_{8}$ in Characteristic $3$