De Sitter Space
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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In mathematics and physics, n-dimensional de Sitter space, denoted dSn, is the Lorentzian analog of an n-sphere (with its canonical Riemannian metric). It is a maximally symmetric, Lorentzian manifold with constant positive curvature, and is simply-connected for n at least 3.In the language of general relativity, de Sitter space is the maximally symmetric, vacuum solution of Einstein''s field equation with a positive (repulsive) cosmological constant (corresponding to…mehr

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Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. In mathematics and physics, n-dimensional de Sitter space, denoted dSn, is the Lorentzian analog of an n-sphere (with its canonical Riemannian metric). It is a maximally symmetric, Lorentzian manifold with constant positive curvature, and is simply-connected for n at least 3.In the language of general relativity, de Sitter space is the maximally symmetric, vacuum solution of Einstein''s field equation with a positive (repulsive) cosmological constant (corresponding to a positive vacuum energy density and negative pressure). When n = 4, it is also a cosmological model for the physical universe; see de Sitter universe. De Sitter space was discovered by Willem de Sitter, and independently by Tullio Levi-Civita (1917).