Bulletin of the Iranian Mathematical Society

Bulletin of the Iranian Mathematical Society

‎Spacelike hypersurfaces with constant $S$ or $K$ in de Sitter‎ ‎space or anti-de Sitter space

Document Type : Research Paper

Authors
School of Mathematics‎ ‎and Information Science‎, ‎Xianyang Normal University‎, ‎Xianyang‎, ‎712000‎, ‎Shaanxi‎, ‎P‎. ‎R‎. ‎China
Abstract
‎Let $M^n$ be an $n(n\geq 3)$-dimensional complete connected and‎ ‎oriented spacelike hypersurface in a de Sitter space or an anti-de‎ ‎Sitter space‎, ‎$S$ and $K$ be the squared norm of the second‎ ‎fundamental form and Gauss-Kronecker curvature of $M^n$‎. ‎If $S$ or‎ ‎$K$ is constant‎, ‎nonzero and $M^n$ has two distinct principal‎ ‎curvatures one of which is simple‎, ‎we obtain some‎ ‎characterizations of the Riemannian products‎: ‎$S^{n-1}(a) \times‎ ‎H^{1}(\sqrt{a^2-1})$‎, ‎or $H^{n-1}(a) \times H^1(\sqrt{1-a^2})$‎.
Keywords
Subjects

Volume 41, Issue 4 - Serial Number 4
August 2015
Pages 835-855

  • Receive Date 11 March 2013
  • Revise Date 10 May 2014
  • Accept Date 10 May 2014