Abstract
A cosmological model in which the universe has its critical density and the gravitational and cosmological “constants”G and Λ are time-dependent is presented. The model may possibly solve the horizon and monopole problems. It predicts a perpetually expanding universe in whichG increases and Λ decreases with time in a manner consistent with conservation of the energy-momentum tensor. The model also allows the calculation of various cosmological parameters.
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Abdel-Rahman, A.M.M. A critical density cosmological model with varying gravitational and cosmological “constants”. Gen Relat Gravit 22, 655–663 (1990). https://doi.org/10.1007/BF00755985
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DOI: https://doi.org/10.1007/BF00755985