I understand that FullSimplify, in general, uses one core only. However, when you FullSimplify a matrix or vector, I'm guessing Mathematica simplifies each element independently of the rest, so... why does it use one core only? Can I tell Mathematica to use all cores in that case? How?
I know I could create different kernels and launch the FullSimplify independently for each element on a different kernel... but apart for not being very convenient, there's also the limitation that the maximum number of kernels depends on your Mathematica license, and it may be very well lower than your number of cores.