%0 Journal Article %T Salem Numbers and Automorphisms of Complex Surfaces %A Paul Reschke %J Mathematics %D 2012 %I arXiv %X For two-dimensional complex tori, we characterize the set of all values of positive entropy that arise from automorphisms. For K3 surfaces, we give suffcient conditions for a positive value to be the entropy of some automorphism. %U http://arxiv.org/abs/1202.5245v1