Re: Multiple sum excluding some terms
- To: mathgroup at smc.vnet.net
- Subject: [mg44101] Re: Multiple sum excluding some terms
- From: Jens-Peer Kuska <kuska at informatik.uni-leipzig.de>
- Date: Thu, 23 Oct 2003 07:14:42 -0400 (EDT)
- Organization: Universitaet Leipzig
- References: <bn5dpi$6aa$1@smc.vnet.net>
- Reply-to: kuska at informatik.uni-leipzig.de
- Sender: owner-wri-mathgroup at wolfram.com
Hi,
Sum[If[i =!= j, m[i, j], 0], {j, 1, 3}, {i, 1, 2}]
Sum[(1 - KroneckerDelta[i, j])m[i, j], {j, 1, 3}, {i, 1, 2}]
Regards
Jens
Guillermo Sanchez wrote:
>
> Hi friends
>
> How make a multiple sum (example: Sum[m[i, j], {j, 1, 3}, {i, 1, 2}])
> excluding terms i = j?
>
> Guillermo Sanchez