Séminaire Géométrie et groupes discrets

Convex hulls of quasicircles in hyperbolic and anti-de Sitter space

by Prof. Sara Maloni (University of Virginia)

Amphithéâtre Léon Motchane (IHES)

Amphithéâtre Léon Motchane



Thurston conjectured that quasi-Fuchsian manifolds are uniquely determined by the induced hyperbolic metrics on the boundary of their convex core and Mess extended this conjecture to the context of globally hyperbolic anti de-Sitter spacetimes. In this talk I will discuss a universal version of Thurston and Mess' conjectures: any quasisymmetric homeomorphism from the circle to itself is obtained on the convex hull of a quasicircle in the boundary at infinity of the 3-dimensional hyperbolic (resp. anti-de Sitter) space. We will also discuss a similar result for convex domains bounded by surfaces of constant curvature K in (-1,0) in the hyperbolic setting and of curvature K in (-∞,-1) in the anti de-Sitter setting with a quasicircle as their asymptotic boundary.

(This is joint work in progress with F. Bonsante, J. Danciger and J.-M. Schlenker.)