General Relativity is written in the language of tensors. A tensor is a mathematical object that maps a collection of real vectors and real covectors onto the real numbers.
What would be the physical significance of a complex tensor?
How about an integer-valued tensor?
In other words, can such an object be used to describe gravity, for example?
This post imported from StackExchange Physics at 2016-11-10 22:26 (UTC), posted by SE-user Optimus Prime