Published online by Cambridge University Press: 20 November 2018
The purpose of this paper is to present a geometric theorem which provides a proof of a fundamental theorem of finite Markov chains.
The theorem, stated in matrix theoretic terms, concerns the asymptotic behaviour of the powers of an n by n stochastic matrix, that is, a matrix of non-negative entries each of whose row sums is 1. The matrix might arise from a repeated physical process which goes from one of n possible states to another at each iteration and whose probability of going to a state depends only on the state it is in at present and not on its more distant history.