A Characterisation of a Class of Functions of Finite Markov Chains

Abstract

In a previous paper ([2], Theorem 3.1) this author has given some sufficient conditions for a stationary process to be a function of a finite Markov chain. Suppose $\mathscr{F}$ denotes the class of functions which satisfy these conditions. In this paper we give a characterisation of $\mathscr{F}$. Using this characterisation $\mathscr{F}$ is shown to be wider than the class of regular functions of finite Markov chains.