**Next message:**Rolf Mertig: "Re: Contraction of expressions containing Eps tensors"**Previous message:**Tyger: "What's the next of B0?"**Next in thread:**Rolf Mertig: "Re: Contraction of expressions containing Eps tensors"**Reply:**Rolf Mertig: "Re: Contraction of expressions containing Eps tensors"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

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.

**Next message:**Rolf Mertig: "Re: Contraction of expressions containing Eps tensors"**Previous message:**Tyger: "What's the next of B0?"**Next in thread:**Rolf Mertig: "Re: Contraction of expressions containing Eps tensors"**Reply:**Rolf Mertig: "Re: Contraction of expressions containing Eps tensors"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

*
This archive was generated by hypermail 2b29
: 02/28/17-08:40:01 AM Z CET
*