It’s sort of an interesting problem mathematically, but it doesn’t seem too relevant to physics
I disagree, certainly this is where all of the fun stuff happens in classical relativity.
Anyway, I guess I buy your explanation that time evolution identifies the state spaces of two parallel hypersurfaces, but my quarter-educated hunch is that you’ll find it’s not so in general.
I disagree, certainly this is where all of the fun stuff happens in classical relativity.
Anyway, I guess I buy your explanation that time evolution identifies the state spaces of two parallel hypersurfaces, but my quarter-educated hunch is that you’ll find it’s not so in general.