Calvin D. Ritchie wrote:

> Is there a reliable freeware program for Windows XP Pro to do traces

> of gamma matrix products? I've tried Google, but couldn't find a

> search phrase that was precise enough to find anything useful.
The following are free software packages that have some facility for

dealing with the algebra of Dirac gamma matrices:

Maxima,

http://maxima.sourceforge.net/
Axiom,

http://wiki.axiom-developer.org/FrontPage
GiNaC,

http://www.ginac.de/
I believe all of them work on Windows. However, if you decide to use

any one of them, you'll have to spend some time learning to use the

provided environment.

There also seem to be addon packages for commercial computer algebra

systems that do the trick:

Maple,

http://a-siver.chat.ru/
Mathematica,

http://library.wolfram.com/infocenter/MathSource/435/
Reduce,

www.reduce-algebra.com/docs/cvit.pdf
Hope this helps.

Igor