Videos

Recent Progress in Topological and Geometric Structures in Low Dimensions: Translation lengths in (fine) curve graphs

Presenter
March 26, 2026
Keywords:
  • Surfaces
  • geometric 3-manifolds
  • mapping class groups
  • foliations
  • fibrations
  • Anosov flows
  • Teichmuller space
  • conformal structures
MSC:
  • 57M50 - General geometric structures on low-dimensional manifolds
Abstract
Given a surface S, we consider two associated graphs: the by now classical curve graph, on which the mapping class group of S acts, and the recently defined fine curve graph, on which the homeomorphism group of S acts. In both cases, for a group element, having positive asymptotic translation length (i.e. displacing every vertex at linear speed, roughly speaking) corresponds to having interesting topological/dynamical properties. I will discuss joint work with Sebastian Hensel and Frédéric Le Roux where we establish relations and study differences between the asymptotic translation lengths of homeomorphisms and mapping classes