Is general relativity about Lorentzian manifolds only?
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General relativity is often used in context of Lorentzian manifolds. But the texts which describe Einstein Field Equations discuss them in context of general pseudo-Riemannian manifolds.
It seems natural that general relativity be restricted to Lorentzian manifolds because of time problems, but it is not clear whether there is and should be explicit restriction to Lorentzian manifolds.
It seems natural that general relativity be restricted to Lorentzian manifolds because of time problems, but it is not clear whether there is and should be explicit restriction to Lorentzian manifolds.
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