Automorphisms of Twisted Chevalley Groups

Automorphisms and isomorphisms of Chevalley groups over almost arbitrary commutative rings are by now understood. The next step in the algebraic classification of algebraic-type groups over commutative rings is the study of automorphisms (and isomorphisms) of twisted Chevalley groups. These groups form a natural generalization of classical Chevalley groups; for example, they include unitary groups over rings with involution

In this talk, we will present recent progress in this direction. In particular, we are now close to a complete description of automorphisms of twisted Chevalley groups over arbitrary commutative rings with 1/2

The talk will be held in person in math seminar room and also on-line via zoom with the link
https://biu-ac-il.zoom.us/j/82747834707