General Relativity and Gravitation

, Volume 4, Issue 4, pp 299–307 | Cite as

Lorentz cobordism. II

  • P. Yodzis
Research Articles


It is shown that ‘changes of topology’ (of spacelike sections) in the spacetime of classical general relativity are consistent with the following requirements: (i) stable causality, (ii) future causal geodesic completeness, and (iii) finite, positive energy density. This amounts to showing that the framework of classical general relativity encompasses ‘changes of topology’.


Null Geodesic Timelike Curve Solid Torus Closed Timelike Curve Classical General Relativity 
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Copyright information

© Plenum Publishing Company Limited 1973

Authors and Affiliations

  • P. Yodzis
    • 1
  1. 1.School of Theoretical PhysicsDublin Institute for Advanced StudiesDublin 4Ireland

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