Name: Dr. Jaime Hernandez Sanchez;icbi (email_not_shown)
Date: 12/09/04-03:45:24 AM Z


DEAR MERTIG:

I BELIEVE THAT THE TROUBLE THIS ONE SOLVED

THERE ISN`T MISTAKE WHE I RUN FEYNCALC

I HAVE USED "tr" instead of TR, with

 tr = TR[Calc[#]] &;

I WILL CHECK WITH SOME PROGRAMS.

THANKS A LOT FOR YOUR HELP

UN CHORRO DE SALUDOS MEXICANOS PARA MERTIG Y FREDERIK

SINCERELY YOURS

JAIME

On Thu, 09 Dec 2004 00:25:45 +0100, Rolf Mertig wrote
> Dear Jaime,
>
> Dr. Jaime Hernandez Sanchez;icbi wrote:
>
> >Dear Mertig:
> >
> >i have several problems with Feyncal.
> >
> >I have mathematica 5 on mac-g5`s plataform.
> >
> >Firts, when i run FeynCalc, It gives the following result
> >
> >DumpGet::bgbf: File \
> >/Library/Mathematica/Applications/HighEnergyPhysics/Tarcer/tarcer25.mx cannot \
> >be loaded, it is corrupted or is written on a different machine
> >
> >
> Please evaluate in an emtpy notebook (without loading FeynCalc):
>
> SetDirectory["/Library/Mathematica/Applications/HighEnergyPhysics/Tarcer/"];
> NotebookOpen["/Library/Mathematica/Applications/HighEnergyPhysics/Tarcer/Tarcer.nb"];
>
> Then evaluate the whole notebook.
> This will produce a new "tarcer25.mx" (or similar, depending on the
> setting of $RankLimit )
>
> >I have tried to replace the file tarcer25.mx by tarcer23.mac.mx from web page
> >mertig.com, however
> >
> >it gives other mistake.
> >
> >Second
> >
> >I have tried to run some simple programs and to verify that they are correct, for
> >example
> >
> >a trivial exercise
> >
> >FullSimplify[TR[(GS[k] + m).(GA[mu]).(GS[p] - m).GA[nu]]]
> >
> >it gives a correct result
> >
> >but
> >
> >TR[(GS[p1] + m).(GA[mu].GS[k].GA[ nu] + 2 GA[mu] FV[p2, nu]).(GS[p2] +
m).(GA[nu].GS[k].GA[mu] +
> >2 GA[mu] FV[p2, nu])]
> >
> >mathamatica does not give a correct result.
> >
> >
> This is a bug (probably introduced when fixing other bugs last year).
> It should only occur if you call TR on unsimplified noncommutative
> expressions directly.
> A quick workaround is to use "tr" instead of TR, with
>
> tr = TR[Calc[#]] &;
>
> I am planning to fix FeynCalc - bugs (and some error messages
> showing up when loading FeynCalc in Mathematica 5.1 ) together with
> Frederik before Christmas, but I cannot fix them right now.
>
> Sorry about the trouble.
>
> Saludos,
>
> Rolf Mertig
>
> GluonVision GmbH
> Berlin
>
> >
> >I need your help.
> >
> >
> >Regards
> >
> >
> >Jaime
> >
> >
> >--
> >Universidad Autonoma del Estado de Hidalgo
> >Centro de Investigacion Avanzada en Ingenieria Industrial
> >Licenciatura en Fisica y Tecnologia Avanzada
> >Pachuca, Hidalgo. C. P. 42090
> >Tel y Fax: (771)7172000 ext. 6733
> >
> >

--
Universidad Autonoma del Estado de Hidalgo
Centro de Investigacion Avanzada en Ingenieria Industrial
Licenciatura en Fisica y Tecnologia Avanzada
Pachuca, Hidalgo. C. P. 42090
Tel y Fax: (771)7172000 ext. 6733



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