English

Loxodromic elements in big mapping class groups via the Hooper-Thurston-Veech construction

Geometric Topology 2023-03-22 v1 Dynamical Systems

Abstract

Let SS be an infinite-type surface and pSp\in S. We show that the Thurston-Veech construction for pseudo-Anosov elements, adapted for infinite-type surfaces, produces infinitely many loxodromic elements for the action of Mod(S;p)Mod(S;p) on the loop graph L(S;p)L(S;p) that do not leave any finite-type subsurface SSS'\subset S invariant. Moreover, in the language of Bavard-Walker, Thurston-Veech's construction produces loxodromic elements of any weight. As a consequence of Bavard and Walker's work, any subgroup of Mod(S;p)Mod(S;p) containing two "Thurston-Veech loxodromics" of different weight has an infinite-dimensional space of non-trivial quasimorphisms.

Keywords

Cite

@article{arxiv.2003.00102,
  title  = {Loxodromic elements in big mapping class groups via the Hooper-Thurston-Veech construction},
  author = {Israel Morales and Ferran Valdez},
  journal= {arXiv preprint arXiv:2003.00102},
  year   = {2023}
}

Comments

30 pages, 17 Figures

R2 v1 2026-06-23T13:58:23.278Z