English

The converse of the Schwarz Lemma is false

Complex Variables 2019-10-08 v3 Geometric Topology

Abstract

Let h:XYh:X \to Y be a homeomorphism between hyperbolic surfaces with finite topology. If hh is homotopic to a holomorphic map, then every closed geodesic in XX is at least as long as the corresponding geodesic in YY, by the Schwarz Lemma. The converse holds trivially when XX and YY are disks or annuli, and it holds when XX and YY are closed surfaces by a theorem of W. Thurston. We prove that the converse is false in all other cases, strengthening a result of Masumoto.

Keywords

Cite

@article{arxiv.1411.5913,
  title  = {The converse of the Schwarz Lemma is false},
  author = {Maxime Fortier Bourque},
  journal= {arXiv preprint arXiv:1411.5913},
  year   = {2019}
}

Comments

8 pages, 2 figures