General Relativity and Gravitation

, Volume 22, Issue 9, pp 1045–1065 | Cite as

Nonsingular cosmological model with matter creation and entropy production

  • Walter Petry
Research Articles


The study of nonsingular cosmological models [4] based on a theory of gravitation in flat space-times [1] is continued. For a radiation free universe the solution of the model is given analytically. Under the assumption that entropy cannot decrease the cosmological constant must be zero. At the beginning of the universe all energy is in the form of gravitation. The universe contracts. Matter and radiation are created out of gravitational energy and entropy is produced. The contraction stops and then the universe expands without limit. The creation of matter continues producing entropy but today the production of matter and entropy is negligible. The density parameter Ω0 ≈ 1, i.e. there must be “missing mass” in the universe. The “flatness” and the “homogeneity” problem are solved.


Radiation Entropy Cosmological Constant Differential Geometry Cosmological Model 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Plenum Publishing Corporation 1990

Authors and Affiliations

  • Walter Petry
    • 1
  1. 1.Mathematisches Institut der Universität Düsseldorf4 Düsseldorf 1Federal Republic of Germany

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