On the applicability of some physical notions to the description of the universe

Details On the applicability of some physical notions to the description of the universe On the applicability of some physical notions to the description of the universe

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990azh....67.1121k&link_type=abstract

Astronomicheskii Zhurnal (ISSN 0004-6299), vol. 67, Nov.-Dec. 1990, p. 1121-1133. In Russian.

Physics

Astronomical Models, Physics, Universe, Gravitational Fields, Infinity, Relativity, Space-Time Functions

Scientific paper

It is shown that the real difficulty of general relativity is not the plurality of models in the description of an isotropic universe that is homogeneous as a whole, but the different description, in the framework of a single model, of the same universe by different equivalent observers. If the universe can still be covered by a single frame of reference, then this frame of reference is necessarily maximally degenerate. By removing the singularity, i.e., determining the observer, the domain of determination of the real gravitational field is narrowed, and therefore some physical quantities have a domain of applicability smaller than the one to which they are applied (the whole universe).

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