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Assuming that the relativistic universe is homogeneous and isotropic, we canunambiguously determine its model and physical properties, which correspondwith the Einstein general theory of relativity (and with its two specialpartial solutions: Einstein special theory of relativity and Newton gravitationtheory), quantum mechanics, and observations, too.

astrophysics and space science

The model of a flat (Euclidean) expansive homogeneous and isotropic  relativistic universe in the light of the general relativity, quantum  mechanics, and observations