Name: Seung-il Nam Date: 02/07/11-02:39:44 PM Z


I installed HighEnergyPhysics-4.1.1.0 in my Mac OS 10.6.6.
I tried Tr[GA[a]], in which “a” is a index and expected the answer to be zero, but not.

Tr[GA[a]] = 4\gamma^a !?!!

What’s wrong?

Cheers, SiNam