Convex Spacelike Hypersurfaces of Constant Curvature in de Sitter Space

Abstract

We show that for a very general and natural class of curvature functions (for example the curvature quotients $({\sigma }_n/{\sigma }_l{)}^{\frac{1}{n-l}}$) the problem of finding a complete spacelike strictly convex hypersurface in de Sitter space satisfying $f(\kappa )=\sigma \in (1,\infty )$ with a prescribed compact future asymptotic boundary $\Gamma$ at infinity has at least one smooth solution (if l = 1 or l = 2 there is uniqueness). This is the exact analogue of the asymptotic plateau problem in Hyperbolic space and is in fact a precise dual problem. By using this duality we obtain for free the existence of strictly convex solutions to the asymptotic Plateau problem for ${\sigma }_l=\sigma$; $1\le l<n$ in both deSitter and Hyperbolic space.

arXiv comment24 pages