Name: Pierre Artoisenet (email_not_shown)
Date: 12/02/05-05:16:40 PM Z


I'm a brand new user of FeynCalc, so my question is probably simple to answer.
I have the following problem. I define a four vector as

FourVector[t,alpha]=expr, (1)

where expr is a complicated expression containing Levi Civita tensors (with at least 3 contracted indeces). When I square this four vector using

Contract[FourVector[t,alpha],FourVector[t,alpha]]

the result is an expression where most of the Levi Civita tensors with an index alpha are not contracted.

How can I contract these tensors ?
Do I use the correct way in (1) to store a four vector under the name t ?

Thanks.



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