Discrete probabilistic and algebraic dynamics: a stochastic commutative Gelfand-Naimark Theorem

Abstract

We introduce a category of stochastic maps (certain Markov kernels) on compact Hausdorff spaces, construct a stochastic analogue of the Gelfand spectrum functor, and prove a stochastic version of the commutative Gelfand-Naimark Theorem. This relates concepts from algebra and operator theory to concepts from topology and probability theory. For completeness, we review stochastic matrices, their relationship to positive maps on commutative $C^{\ast }$-algebras, and the Gelfand-Naimark Theorem. No knowledge of probability theory nor $C^{\ast }$-algebras is assumed and several examples are drawn from physics.

74 pages, 5 figures, minor edits and clarifications added since v1, comments welcome