Colloquium abstracts

D.Q. Zhang
National University of Singapore
December 27, 2012

Automorphisms of positive entropy on compact Kahler or algebraic varieties:  An automorphism g on a compact variety X is of positive entropy if its action on the cohomology groups of X is of expanding type. We report recent results on the relation between the geometry of X and the existence of such expanding g and characterise those X with a maximal number of such g of expanding type.