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- W2553276048 abstract "We study estimations of the age of the Universe for different cosmological models which are based on the space of constant curvature. If the cosmological constant is zero, we give the explicit solution of the Friedman equations for any linear equation of state. Note that the model (when k = 0) is not flat in fact because the appropriate section curvature is positive. For a Friedmann Robertson Walker manifold with the relative curvature parameter 1 (with small density of matter) all spacelike section curvatures are zero. Hence it is this model that should be considered to be flat. If the radius of the Universe a did not depend on time, then these section curvatures would be k/a2 as well as in the initial model. Yet since the radius of the Universe depends on time, its real section curvatures differ from the initial model. Modern value of the age of the Universe can be obtained without the Einstein cosmological constant for this model. We also consider the problem of matter creation at the first moment of the Universe and the problem of disappearance of matter at the end of the Universe. A new horizontal lift is proposed." @default.
- W2553276048 created "2016-11-30" @default.
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- W2553276048 date "2011-01-01" @default.
- W2553276048 modified "2023-09-26" @default.
- W2553276048 title "Космология: оценки возраста Вселенной" @default.
- W2553276048 hasPublicationYear "2011" @default.
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