Name: jinghantao Date: 12/02/04-03:02:53 AM Z
feyncalc£¬hello
when i use trace fuction to calculate the
expression:Tr[(GA[j].GS[q] -
GS[q].GA[j]).(GA[i].GS[q] -
GS[q].GA[i])],the result is null. But for the
expression:Tr[DiracSimplify[(GA[j].GS[q] -
GS[q].GA[j]).(GA[i].GS[q] -
GS[q].GA[i])]],the result isnot null,
furthermore, the second expression’s result is the same to my
manuscript. why? Could you give me some help? thanks very much.
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡jinghantao
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡[jinght_at_HIDDEN-E-MAIL]
¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡¡2004-12-02