Kawaguchi-Silverman conjecture on automorphisms of projective threefolds

Abstract

Under the framework of dynamics on normal projective varieties by Kawamata, Nakayama and Zhang \cite{Kawamata85,Nakayama10,NZ09,NZ10,Zhang16}, Hu and the author \cite{HL21}, we may reduce Kawaguchi-Silverman conjecture for automorphisms $f$ on normal projective threefolds $X$ with either the canonical divisor $K_X$ is trivial or negative Kodaira dimension to the following two case: (i) $f$ is a primitively automorphism of a weak Calabi-Yau threefold (ii) $X$ is a rationally connected threefold. And we prove Kawaguchi-Silverman conjecture is true for automorphisms of normal projective varieties $X$ with the irregularity $q(X)\ge \dim X-1$. Finally, we discuss Kawaguchi-Silverman conjecture on normal projective varieties with Picard number two.

16 pages, thanks the referee for useful comments, accepted by International Journal of Mathematics. arXiv admin note: text overlap with arXiv:2208.02616