In this paper, we establish several sufficient conditions for a compact spacelike surface with non-degenerate second fundamental form in the 3-dimensional de Sitter space to be spherical. With this aim, we develop a formula for these surfaces which involves the mean and Gaussian curvatures of the fi
The General Metrical Fundamental Form of the DE SITTER Universes
โ Scribed by H.-J. Treder
- Publisher
- John Wiley and Sons
- Year
- 1975
- Tongue
- English
- Weight
- 177 KB
- Volume
- 296
- Category
- Article
- ISSN
- 0004-6337
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๐ SIMILAR VOLUMES
## Abstract A family of cosmological models in considered which in a certain synchronized system of reference possess flat slices __t__ = const. They are generated from the EINSTEINโDE SITTER universe by a suitable transformation. Under physically reasonable presumptions these transformed models fu
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