The generalized Milnor-Thurston conjecture and equal topological entropy class in symbolic dynamics of order topological space of three letters

摘要

This paper presents an answer to an open problem in the dynamical systems of three letters: the generalized Milnor-Thurston conjecture on the existence of infinitely many plateaus of topological entropy in the two-dimensional parameter plane. The concept of equal topological entropy class is introduced by the dual star product which is a generalization of the Derrida-Gervois-Pomeau star product to the symbolic dynamics of three letters for the endomorphisms on the interval. The algebraic rules established by the dual star products for the doubly superstable kneading sequences are equivalent to the normal factorization of the Milnor-Thurston characteristic polynomials. Moreover, the classification theory of symbolic primitive and compound sequences based on the topological conjugacy in the meaning of equal entropy is completed in the topological space Sigma(3) of three letters. [References: 32]