Fuchsian polyhedra in Lorentzian space-forms

TL;DR

This paper proves the existence and uniqueness of Fuchsian polyhedra in Lorentzian space-forms for surfaces of genus >1 with constant curvature and conical singularities, extending classical theorems to higher genus cases.

Contribution

It extends classical polyhedral theorems to higher genus surfaces in Lorentzian space-forms, establishing existence and uniqueness of Fuchsian polyhedra.

Findings

Existence of convex Fuchsian polyhedra in Lorentzian space-forms.

Uniqueness of these polyhedra up to isometries.

Extension of classical theorems to higher genus cases.

Abstract

Let S be a compact surface of genus >1, and g be a metric on S of constant curvature K\in\{-1,0,1\} with conical singularities of negative singular curvature. When K=1 we add the condition that the lengths of the contractible geodesics are >2\pi. We prove that there exists a convex polyhedral surface P in the Lorentzian space-form of curvature K and a group G of isometries of this space such that the induced metric on the quotient P/G is isometric to (S,g). Moreover, the pair (P,G) is unique (up to global isometries) among a particular class of convex polyhedra, namely Fuchsian polyhedra. This extends theorems of A.D. Alexandrov and Rivin--Hodgson concerning the sphere to the higher genus cases, and it is also the polyhedral version of a theorem of Labourie--Schlenker.