Seminar series
Date
Tue, 17 Nov 2009
Time
17:00 -
18:00
Location
L2
Speaker
Vincent Franjou
Organisation
Nantes
A classic problem in invariant theory, often referred to as Hilbert's 14th problem, asks, when a group acts on a finitely generated commutative algebra by algebra automorphisms, whether the ring of invariants is still finitely generated. I shall present joint work with W. van der Kallen treating the problem for a Chevalley group over an arbitrary base. Progress on the corresponding problem of finite generation for rational cohomology will be discussed.