Space-Time Topology (II)—Causality, the Fourth Stiefel–Whitney Class and Space-Time as a Boundary
| Autor: | Frank Antonsen, Malene Steen Nielsen Flagga |
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| Rok vydání: | 2004 |
| Předmět: |
Class (set theory)
Physics and Astronomy (miscellaneous) General Mathematics Space time Boundary (topology) Topology Mathematics::Algebraic Topology Mathematics::Geometric Topology Manifold Causality (physics) Scheme (mathematics) Stiefel–Whitney class Mathematics::Symplectic Geometry Topology (chemistry) Mathematics |
| Zdroj: | International Journal of Theoretical Physics. 43:1917-1930 |
| ISSN: | 0020-7748 |
| DOI: | 10.1023/b:ijtp.0000049000.35083.fb |
| Popis: | We show that stable causality is related to the vanishing of the top Stiefel–Whitney class of a space-time manifold M, and that if M is a stably causal space-time manifold, then it is the boundary of a five-dimensional space-time. We then propose a scheme for making it both a necessary and sufficient condition. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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