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Dear George,

try to decompose your arbitrary matrix via 16 linear independent gamma

matrixes, I, \gamma^5, \Gamma^{\mu}, \gamma^5 \gamma^{\mu}, \sigma^{\mu\nu}.

After that multiplying by any gamma-matrix using usual rules in FeynCalc

will not be problematic.

Sincerely, Dimitry Fedorov,

Nuclear physics institute,

Moscow State University.

----- Original Message -----

From: George <noreply@feyncalc.org>

To: <feyncalc@feyncalc.org>

Sent: Monday, May 28, 2007 9:46 AM

Subject: Multiplication of Dirac Gamma matrices by arbitrary matrix

*> Dear All,
*

*> Can I multiply Dirac Gamma Matrices by an arbitrary matrix?
*

*> When I try to do so, it treats my arbitrary matrix as a matrix but Gamma
*

as a not matrix but like a just number, it directly multiplies all elements

of my arbitrary matrix simply by gamma.

*>
*

*> If I am not clear pls give me your feedbck and I will try to precise my
*

question.

*>
*

*> Cheers
*

*> George
*

*>
*

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