
#1
Apr1211, 07:40 AM

P: 2,456

There are reasons why our space is 3D. In 2D all systems are bound, in 4D they are unstable.
What 'reasons' are for having 1D time vs 2D time? I don't want to go deep into the AP stuff; just may some constraints one might know like 'Maxwell equation wont be consistent' etc. 



#2
Apr1311, 08:03 AM

Mentor
P: 16,469

With 2 timelike dimensions you could have closed timelike curves even in flat spacetime. I don't think we would have causality in such a universe.



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