Speaker:
Yuri Zarhin
Institution:
Penn State University
Time:
Wednesday, May 8, 2019 - 4:00pm to 4:50pm
Host:
Location:
RH 340P
A classical theorem of Jordan asserts that each finite subgroup of the complex general linear group GL(n)
is ``almost commutative": it contains a commutative normal subgroup
with index bounded by an universal constant that depends only on n.
We discuss an analogue of this property for the groups of birational (and biregular)
automorphisms of complex algebraic varieties
and the groups of diffeomorphisms of real manifolds.