D[...] change in 5.1
- To: mathgroup at smc.vnet.net
- Subject: [mg58686] D[...] change in 5.1
- From: Alexei Akolzin <akolzine at uiuc.edu>
- Date: Thu, 14 Jul 2005 02:49:13 -0400 (EDT)
- Organization: University of Illinois at Urbana-Champaign
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
In previous version two lines below seemed to work as intended:
In:
n /: D[n[i_], x[j_], NonConstants -> {n,r}] := (1/r)( d[i,j] - n[i] n[j] );
D[ 1 + n[k], x[l] ]
Out: (-n[k] n[l] + d[k,l]) \ r
But now in ver 5.1 I get something like:
Out: D[n, x[l], NonConstants -> {J, r, n}] (1)
The funny part is that D[ n[k], x[l] ] is recognized and substituted by the
expression associated with definition of n.
I wonder whether there is a possibility to get Mathematica 5.1 recognize
n[k] as an indexed symbol n.
Thanks.
Alexei Akolzin.