A characterization of hyperbolic cylinders in the de Sitter space
The author proves the following Theorem: A complete spacelike hypersurface in the de Sitter spacetime \(S^{n+1}_1\) with constant mean curvature \(H\) satisfying \(H^2 = 4(n -1)/n^2\) which is not connected at infinity must be, up to ridid motions, a certain hyperbolic cylinder.
scientific article; zbMATH DE number 889573
scientific article