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]
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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/ *
,,,
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