Re: Dirac Algebra In Mathematica

*To*: mathgroup*Subject*: Re: Dirac Algebra In Mathematica*From*: petti at ALLEGHENY.SCRC.Symbolics.COM*Date*: Wed, 5 Apr 89 12:04:41 CDT

>From RDC at vms.cis.pittsburgh.edu Mon Apr 3 15:50:58 1989 >Subject: RE: Dirac Algegra >To: stevec at ncsa.uiuc.edu >X-Vms-To: IN%"stevec%ncsa.uiuc.EDU at unix.cis.pittsburgh.edu" >Dear Steve, >Earlier this year we discussed the question of Dirac algebra macros for >Mathematica. I am reaching the point of doing some more calculations >which will require this sort of thing. Has anything happened on this >front? I know there are other people who are interested in this, but >I haven't been following the latest developments. Could you please >fill me in. >Thanks, >Bob Carlitz I am just finishing a general tensor package to do universal, Clifford, symplectic, Grassmann, and enveloping Lie algebras in MACSYMA. Dirac is a special case of Clifford at this level, but this package operates without choosing a matrix representation. The matrix version is another job. What do you want in the package? I assume a matrix representation with the basic operations, such as hermitian conjugation, particle conjugation etc.? Dick Petti petti at symbolics.com petti at scrc-stony-brook.arpa ----- End Included Message -----