Different number of time dimensions

[Dmitry67]

I am layman, so I can't find an answer on my own.

Suppose, on low energies space is (locally) pseudo-euclidean with the number of spatial dimensions S and time timensions T

In our universe S=3 and T=1

My question: is it possible to 'adjust' equations of GR and QM/QFT to the different S and T? Are there any "no-go" things (like orbit stabilty which, for T=1, is possible only if S=3)? What if T=0 or T>1?

 

[Demystifier]

Equations of classical GR do not care about the number of spacelike/timelike dimensions.

For QFT, it's not so trivial. Path-integral equations do not care about that either (at least formally), but that does not seem to be enough.

 

[Orbb]

Not a direct answer, but

http://space.mit.edu/home/tegmark/dimensions.pdf"

might be of help. The cases T=0, T>1 are mentioned as well.