Name: Rolf Mertig Date: 03/16/07-03:45:50 PM Z

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GS[p]+a
is right.

There are basically no explicit matrices in FeynCalc.
GS[p] (or DiracSlash[p] etc.) are algebraic objects.

See also:

http://www.feyncalc.org/FeynCalcBook/Tr/

Regards,

Rolf Mertig
GluonVision GmbH, Berlin
http://www.gluonvision.com

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