Computation of Topological Entropy via $\varphi$-expansion, an Inverse Problem for the Dynamical Systems $\beta x+\alpha \mathrm{mod}1$

Abstract

We give an algorithm, based on the $\varphi$-expansion of Parry, in order to compute the topological entropy of a class of shift spaces. The idea is the solve an inverse problem for the dynamical systems $\beta x+\alpha \mathrm{mod}1$.The first part is an exposition of the $\varphi$-expansion applied to piecewise monotone dynamical systems. We formulate for the validity of the $\varphi$-expansion, necessary and sufficient conditions, which are different from those in Parry's paper.

34 pages