2 papers
math.DS2025
ErdÅs' problem and -separated sets
Enhui Shi, Hui Xu
Inspired by the ErdÅs' problem in Ramsey theory, we propose a dynamical version of the problem and answer it positively for circle maps.
math.DS2024
Linearizations of periodic point free distal homeomorphisms on the annulus
Enhui Shi, Hui Xu, Ziqi Yu
Let be an annulus in the plane and be a boundary components preserving homeomorphism which is distal and has no peri…