Chi Cheuk Tsang

collaborators

2 papers

math.GT2025

Minimum dilatations of pseudo-Anosov braids

Chi Cheuk Tsang, Xiangzhuo Zeng

We determine the minimum dilatation $I^´_{n}$ among pseudo-Anosov braids with $n$ strands, for large enough values of $n$ . These are the dilatations attained by the examples of Hirona…

math.GT2024

Minimal stretch factors of orientation-reversing fully-punctured pseudo-Anosov maps

Erwan Lanneau, Livio Liechti, Chi Cheuk Tsang

We show that the stretch factor $I^» (f)$ of an orientation-reversing fully-punctured pseudo-Anosov map $f$ on a finite-type orientable surface $S$ , with $- I ¨ (S) \geq 4$ and having a…