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General Relativity and Gravitation

, Volume 37, Issue 12, pp 1985–1993 | Cite as

On null isotropy in spacetimes

  • Fazilet Erkekoglu
Research Article

Abstract

Null isotropy in a spacetime is defined. The relation of null isotropy to the constant curvature and infinitesimal spatial isotropy is investigated. The influence of null isotropy on conjugate points along null geodesics and curvature singularities is investigated.

Keywords

Spacetime Instantaneous observer Stress-energy tensor Perfect fluid Einstein equation Jacobi operator Weyl operator Null isotropic Infinitesimally spatially isotropic 

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  1. 1.Department of MathematicsHacettepe UniversityAnkaraTurkey

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