Name: ZYJ Date: 01/13/16-09:23:25 PM Z


In[164]:= LC[q, k2, p1, p3]^3 // Contract

\:6B63\:5728\:8BA1\:7B97In[164]:= Eps::argrx: Eps[{LorentzIndex[q], LorentzIndex[k2], LorentzIndex[p1], LorentzIndex[p3], OptionsPattern[Eps]}] called with 5 arguments; 4 arguments are expected.

Out[164]= -24 Null