Speaker: Prof. Michel Brion,法国CNRS Inviter:数学所 Title: Automorphisms and endomorphisms of projective varieties Time & Venue: 2013.3.13 4:00pm S703 Abstract: Consider a projective variety X and its automorphism group, Aut(X). It is known that the connected component of the identity in Aut(X) is an algebraic group, Aut^o(X). In this talk, we will show that any connected algebraic group is isomorphic to Aut^o(X) for some projective variety X. In contrast, we will see that the algebraic semigroups of endomorphisms of X have a very restricted structure. Affiliation:
