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Penrose, R. (1992) Gravity and Quantum Mechanics. In: Gleiser, R.J., Kozameh, C.N. and Moreschi, O.M., Eds., General Relativity and Gravitation 13. Part 1: Plenary Lectures 1992. Proceedings of the 13th International Conference on General Relativity and Gravitation, Cordoba, 28 June-4 July 1992, 179-189.

has been cited by the following article:

• TITLE: On Separation between Metric Observers in Segal’s Compact Cosmos

  AUTHORS: Alexander Levichev, Andrey Palyanov

  KEYWORDS: Separation between Spacetimes, Segal’s Universal Cosmos, Conformal Group Action on U(2), DLF-Theory

  JOURNAL NAME: Journal of Modern Physics, Vol.6 No.14, November 17, 2015

  ABSTRACT: A certain class K of GR homogeneous spacetimes is considered. For each pair E, of spacetimes from K, where conformal transformation g is from . Each E (being or its double cover, as a manifold) is interpreted as related to an observer in Segal’s universal cosmos. The definition of separation d between E and is based on the integration of the conformal factor of the transformation g. The integration is carried out separately over each region where the conformal factor is no less than 1 (or no greater than 1). Certain properties of are proven; examples are considered; and possible directions of further research are indicated.