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Results tagged with general-relativity
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user 127414
A theory that describes how matter interacts dynamically with the geometry of space and time. It was first published by Einstein in 1915 and is currently used to study the structure and evolution of the universe, as well as having practical applications like GPS.
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Compactly generated horizons
How are spacetimes which present compactly generated Cauchy horizons different from the ones with compactly generated cronologic horizons?
I am comfused because I mix the meanings of compactness of ho …
- 291
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2
answers
555
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Noncompact and compact partial Cauchy surface
What is a lay terms explanation for the meaning of compactness and noncompactness of a surface, S or of an horizon?
In particular, I don't understand what a noncompact partial Cauchy surface is and wh …
- 291
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answer
302
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Geodesics and CTC
What is the exact explanation for which CTC (closed timelike curves) are not geodesics? I have already looked up in many papers but none provides the exact reason.
- 291
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Points erased from the lightcone
Regarding the topological condition of global hyperbolicity, which affirms that the future and the past of two points $p$ and $q$ must have compact closure, when does the lightcone contains points whi …
- 291
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answer
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Cauchy horizon and chronology horizon
What is the exact difference between a Cauchy horizon and a chronology horizon?
Aren't both frontiers between the events which are caused and the ones that aren't?
- 291