Name: Wojciech Broniowski Date: 03/29/01-05:25:30 PM Z

> Greetings,
> I type:
> x=GA[5].GS[t].GS[z]

> Tr[DiracSlash[p,k,d,c].x]

> Tr[x.DiracSlash[p,k,d,c]]

> Then, in surprise, I obtain two different answer.
> Please, help me to choose what answer is right.

                                                Best regards,

                                                       Segrey Cherkas

Dear Sergey,

The difference between your two trace results is zero. Out of the 6
momenta: t, z, p, k, c, d, only four are
linearly independent. Using this, you can verify that the difference is
identically zero. See the attached file.

My best -

Wojciech Broniowski [Wojciech.Broniowski_at_HIDDEN-E-MAIL]
Inst. of Nuclear Physics tel: ++48 12 6370222 ext. 431
ul. Radzikowskiego 152 fax: ++48 12 6375441
31342 Cracow, POLAND