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Speaker |
Stoica, Ovidiu Cristinel |
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| Talk Title |
The causal structure of spacetime singularities |
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Abstract |
We analyze the causal structure of some big-bang and black hole singularities. We find that the topology of the lightcones remains intact, despite the fact that the metric is singular. The topology of the lightcones allows spacelike foliations of the singularities, which are therefore compatible with global hyperbolicity and causality. The fact that the lightcones at different events have the same topology no matter whether the events are at or outside the singularities suggests that the causal structure is more universal and fundamental than the metric, which is very different at the singularities. |
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