Can I contract with a matrix defined by myself?

Name: David (email_not_shown)
Date: 04/01/05-08:06:32 PM Z

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Hello,

I am a beginner with FeynCalc.

I need to contract a tensorial output of FeynCalc with a symplectic form {{0,-1,0,0},{1,0,0,0},{0,0,0,-1},{0,0,1,0}}.

Is there anything I can do?

Thank you very much,

David

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