General Relativity and Gravitation

, Volume 23, Issue 4, pp 465–469 | Cite as

Cosmological models with variable gravitational and cosmological “constants”

  • Marcelo Samuel Berman
Research Articles


We consider the Einstein field equations with perfect fluid source and variable Λ andG for the Robertson-Walker metric. When conservation of energy momentum is postulated and the deceleration parameter is assumed constant, we find perfect gas equation of state models in the Euclidean and non-Euclidean cases. The resulting models offer an alternative to the inflationary scenario; they also explain the huge value of the cosmological term in the early universe.


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Copyright information

© Plenum Publishing Corporation 1991

Authors and Affiliations

  • Marcelo Samuel Berman
    • 1
  1. 1.Department of AstronomyUniversity of FloridaGainesville
  2. 2.Departamento de Ciencias Exatas, Faculdade de FilosofiaCiencias e Letras da FURJJoinville, SCBrazil

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