Misiurewicz polynomials for rational maps with nontrivial automorphisms II

Abstract

This paper continues discussions in the author's previous paper about the Misiurewicz polynomials defined for a family of degree $d\ge 2$ rational maps with an automorphism group containing the cyclic group of order $d$. In particular, we extend the sufficient conditions that the Misiurewicz polynomials are irreducible over $\mathbb{Q}$. We also prove that the Misiurewicz polynomials always have an irreducible factor of large degree.

11 pages, 1 figure