- #1
Afonso Campos
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See the Wikipedia article on Penrose-Hawking singularity theorems: https://en.wikipedia.org/wiki/Penrose–Hawking_singularity_theorems.
It says that
A singularity in solutions of the Einstein field equations is one of two things:
1. a situation where matter is forced to be compressed to a point (a space-like singularity)
2. a situation where certain light rays come from a region with infinite curvature (a time-like singularity)
If matter is forced to be compressed to a point, why is this called a space-like singularity?
If certain light rays come from a region with infinite curvature, why is this called a time-like singularity?
It says that
A singularity in solutions of the Einstein field equations is one of two things:
1. a situation where matter is forced to be compressed to a point (a space-like singularity)
2. a situation where certain light rays come from a region with infinite curvature (a time-like singularity)
If matter is forced to be compressed to a point, why is this called a space-like singularity?
If certain light rays come from a region with infinite curvature, why is this called a time-like singularity?