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I'm using version 4.1.1 on Mathematica 4.0.
The problem arises when I have the following expression:
I have previously given the value of all possible scalar products. I want
Feyncalc to expand x using these scalar products.
I've tried to use every possible Feyncalc command, without success. On the
other hand, if I ask it to compute Calc[x*x], it works! I've checked by hand,
the result is correct, but then I loose the sign of x.
Is there a way to make Feyncalc expand a single LC contraction? Is it a bug?
email : email@example.com
web : http://clrwww.in2p3.fr
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