Name: Rolf Mertig (email_not_shown)
Date: 02/23/01-05:13:41 PM Z


Hi,
probably some stupidity in an optimization somewhere.
One workaround is:
DS=MomentumCombine[DiracGammaExpand[DiracSlash[##1]]] &;
 Tr[DS[a, b, c, d, e, f, g, h+i]]

Or use "Calc" before taking the trace.

--
Maybe someone has time to find the bug somewhere in DiracTrace.m ...

I don't ...

Rolf

Albrecht Kyrieleis wrote: > > Hello ! > > Using FeynCalc4.1.0.3b in Mathematica 4.0 for Linux there is > an assymmetry in the "DiracTrace[DiracSlash[expr]" - command: Doing > > "DiracTrace[DiracSlash[a+i, b, c, d, e, f, g, h], DiracTraceEvaluate > -> True]" > > works right and gives scalarproducts. > > But a sum at another position gives nonsens, e.g., > > "DiracTrace[DiracSlash[a, b, c, d, e, f, g, h+i], DiracTraceEvaluate > -> True]" > > tells things like "...DiracTrace`Private`spursav..." in the output > ! > > What is wrong in there ? > > bye, > albrecht > > ------------------------------------------------------------------------ > Name: feynbug.ps > feynbug.ps Type: Postscript Document (application/postscript) > Encoding: 7bit



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