English

Packing entropy for fixed-point free flows

Dynamical Systems 2021-02-23 v1

Abstract

Let (X,ϕ)(X,\phi) be a compact flow without fixed points. We define the packing topological entropy htopP(ϕ,K)h_{\mathrm{top}}^P(\phi,K) on subsets of XX through considering all the possible reparametrizations of time. For fixed-point free flows, we prove the following result: for any non-empty compact subset KK of XX, htopP(ϕ,K)=sup{hμ(ϕ):μ(K)=1,μ is a Borel probability measure onX},h_{\mathrm{top}}^P(\phi,K)=\sup\{\overline{h}_{\mu}(\phi):\mu(K)=1,\mu\text{ is a Borel probability measure on} X\}, where hμ(ϕ)\overline{h}_{\mu}(\phi) denotes the upper local entropy for a Borel probability measure μ\mu on XX.

Keywords

Cite

@article{arxiv.2102.10281,
  title  = {Packing entropy for fixed-point free flows},
  author = {Ruiming Liang and Haoyi Lei},
  journal= {arXiv preprint arXiv:2102.10281},
  year   = {2021}
}
R2 v1 2026-06-23T23:21:01.902Z