Name: Sun Qingfeng Date: 07/02/15-12:50:11 PM Z
I see, Thanks for the detailed reply.
BTW, when I test the FC9.0, I am confused by the output:
Input:
DiracTrace[GA[\[Mu]].GA[\[Nu]]]
Output:
Factoring[4 Pair[LorentzIndex[\[Mu]],
LorentzIndex[\[Nu]]]]
In the previous version(8.20) the output seems to be:
4 Pair[LorentzIndex[\[Mu]],
LorentzIndex[\[Nu]]]
My Mathematica version is 10.1