%0 Journal Article
%T Charakterizations of the Generators of Positive Semigroups on C*- and von Neumann Algebras
%A J. Rheinlaender
%J Physics
%D 2001
%I arXiv
%X Generators of positive C_0-semigroups on C^*-algebras and C_0^*-semigroups on von Neumann algebras are examined. A characterization due to Bratteli and Robinson in the C_0-case is proven in the C_0^*-case. Under the additional assumptions of unitality and contractivity of the semigroup another characterization of the generator is given. This result is restated for the dual and predual semigroup.
%U http://arxiv.org/abs/math-ph/0102003v1