Re: 4D Klein bottle with 4-complex number

Le 07/06/2024 à 06:49, David Dalton a écrit :

 Are the 4-complex numbers related to quaternions?
 And is there any way to apply them to a spacetime in
which time is complex, perhaps with a small imaginary
part that is more important near the Big Bang, if any?

Thank you.
Non, the 4-complex numbers is not related to quaternion. It does not cross-multiply i and j. As for time, it is not a space dimension, and also, there is non-linear function between time and space, so, there is not possible use for relativity.