Re: Creating an Attribute AntiSymmetric ?!?!?!
- To: mathgroup at smc.vnet.net
- Subject: [mg6319] Re: [mg6279] Creating an Attribute AntiSymmetric ?!?!?!
- From: Pasquale Nardone <pnardon at ulb.ac.be>
- Date: Sat, 8 Mar 1997 00:26:44 -0500 (EST)
- Organization: Université Libre de Bruxelles
- Sender: owner-wri-mathgroup at wolfram.com
the usual trick that I use is to define: f[x_,y_]:=-f[y,x]/;{x<y} to have for example a anti symmetric tensor If x and y are not numbers, you can define your own ordering f[x_,y_]:=-f[y,x]/;MyOrder[x,y] -------------------------------------------- Pasquale Nardone * * Université Libre de Bruxelles * CP 231, Sciences-Physique * Bld du Triomphe * 1050 Bruxelles, Belgium * tel: 650,55,15 fax: 650,57,67 (+32,2) * http://homepages.ulb.ac.be/~pnardon/ * ,,, (o o) ----ooO-(_)-Ooo----