Assumption -> quadratic multivariate function
- To: mathgroup at smc.vnet.net
- Subject: [mg47225] Assumption -> quadratic multivariate function
- From: damir at 2d.com (Damir Herman)
- Date: Wed, 31 Mar 2004 02:58:15 -0500 (EST)
- References: <c40spe$mqu$1@smc.vnet.net> <c48qql$lpf$1@smc.vnet.net>
- Sender: owner-wri-mathgroup at wolfram.com
Hi Peter,
Thank you very much for the tip. However, instead of
> f /: Dt[f, ___, {x | y, 3}, ___] = 0;
I think the bulletproof assignment would be
f/: Dt[f, ___, {_, k_/; k>= 3}, ___] = 0;
> I suppose you would like to add
> x/: Dt[x, ___, y | {y, _}, ___] = 0;
> y/: Dt[y, ___, x | {x, _}, ___] = 0;
> too ;-)
Is this really necessay? I thought that Mathematica automatically
assumes the variables are independent.
Damir