English

Entropy of meromorphic maps acting on analytic sets

Complex Variables 2018-07-18 v1 Dynamical Systems

Abstract

Let f:XXf : X\to X be a dominating meromorphic map on a compact K\"ahler manifold XX of dimension kk. We extend the notion of topological entropy htopl(f)h^l_{\mathrm{top}}(f) for the action of ff on (local) analytic sets of dimension 0lk0\leq l \leq k. For an ergodic probability measure ν\nu, we extend similarly the notion of measure-theoretic entropy hνl(f)h_{\nu}^l(f). Under mild hypothesis, we compute htopl(f)h^l_{\mathrm{top}}(f) in term of the dynamical degrees of ff. In the particular case of endomorphisms of P2\mathbb{P}^2 of degree dd, we show that htop1(f)=logdh^1_{\mathrm{top}}(f)= \log d for a large class of maps but we give examples where htop1(f)logdh^1_{\mathrm{top}}(f)\neq \log d.

Keywords

Cite

@article{arxiv.1807.06483,
  title  = {Entropy of meromorphic maps acting on analytic sets},
  author = {Henry De Thélin and Gabriel Vigny},
  journal= {arXiv preprint arXiv:1807.06483},
  year   = {2018}
}
R2 v1 2026-06-23T03:04:29.357Z