🚀 go-pugleaf

There is a Maple package called HIP by Eran Yehudai who is now at Fermi Lab 
which I think does what you want.  It is a package for symbolic calculation 
of Feynman diagrams and relativistic kinematics.  You can get the package 
from ftp.uu.net in the directory pub/physics/maple.  There is also another 
version of HIP for Mma at mathsource.wri.com.  Good luck.


Brian Harris

You might want to give 'FORM' a try. It's especially designed to do 
calculations in High Energy Physics with loads of gamma's. A freeware
version is available by ftp from 'canb.can.nl' (might be 'cana.can.nl').

Kasper

REDUCE of course has been in the business of doing traces of Gamma
matrices and that kind of thing for many years.  I believe that it is
available for at least the CRAY, and Fujitsu (aka Siemens)
supercomputers, as well as a number of other high performance machines
(and indeed low performance machines down to MAC and 80286 PCs)

You can get more information on REDUCE by mailing
reduce-netlib@rand.org or reduce-netlib@can.nl or
redlib@elib.zib-berlin.de with the single line
	send info-package

==John ffitch


PSI just noticed that lThere is also a library routine in the latest
release entitled  
{CVIT - Program for fast calculation of Dirac's $\gamma$-matrices traces}
which comes from Moscow State University

aardvark.ucs.uoknor.edu (Karla ) writes:

>Does anyone know if maple (or any other package) on supercomputers can 
>do traces involving Gamma (Dirac) matrices,contractions of lorentz indices
>and recognise inner products of lorentz 4-vectors.

REDUCE is widely used for Dirac Gamma matrix manipulations and runs 
on most commonly available machines from PC's to Supers like CRAY 
and Fujitsu (an information package can be obtained by sending the 
message 'send info-package' to reduce-netlib@rand.org). 
It currently has two packages (HEPHYS and CVIT) for high energy 
physics calculations. There is also a large bibliography of over 
700 papers referencing REDUCE, many in the high energy physics area.

Eberhard Schruefer
German National Center for Computer Science (GMD)
5205 St. Augustin 1
Germany

--
Dr. E. Schruefer
German National Center for Computer Science (GMD)
Institute I1.P
Postfach 1316