MathGroup Archive 2005

[Date Index] [Thread Index] [Author Index]

Search the Archive

Re: Grassmann variables using NonCommutativeMultiply

  • To: mathgroup at smc.vnet.net
  • Subject: [mg59908] Re: Grassmann variables using NonCommutativeMultiply
  • From: sbjensen at midway.uchicago.edu (Steuard Jensen)
  • Date: Thu, 25 Aug 2005 06:33:44 -0400 (EDT)
  • Organization: The University of Chicago
  • References: <de45i8$qtf$1@smc.vnet.net> <debt13$9bu$1@smc.vnet.net> <deeoho$3q9$1@smc.vnet.net> <dehig5$btd$1@smc.vnet.net>
  • Sender: owner-wri-mathgroup at wolfram.com

Quoth Paul Abbott <paul at physics.uwa.edu.au> in article
<dehig5$btd$1 at smc.vnet.net>:
>  sbjensen at midway.uchicago.edu (Steuard Jensen) wrote:
> > The context in which I'm using this stuff is a package that
> > implements Grassmann variables using NonCommutativeMultiply.

> I assume that you are aware of John Browne's Grassmann Algebra page? See

>   http://www.ses.swin.edu.au/homes/browne/

Yeah, I had looked at least briefly at his work when I first started
trying to put this package together.  From what I recall, his focus is
rather different than what I needed: he seems to go into a lot of
detail with the mathematical formalism, with an aim toward giving an
alternative to vector manipulations (or something like that; as I
said, it's been quite some time since I looked over his site).

Whereas all _I_ need is a way to make fermion fields anti-commute in a
Lagrangian.  Not that I'm against mathematical detail, mind you!  But
his stuff certainly included a vast amount of overhead that I wouldn't
need, and it wasn't obvious to me how to implement the simple behavior
I wanted using his system.

What I've got works quite well for my tasks, or at least, it did under
Mathematica 5.0.  I have high hopes for fixing it up under
5.2... eventually. :)
						Steuard Jensen


  • Prev by Date: Re: SNAP package and Flash toy
  • Next by Date: Re: Nonlinear Fit
  • Previous by thread: Re: Grassmann variables using NonCommutativeMultiply
  • Next by thread: Hi, a simple question, thanks