Help on simplifying symbolic sum?
- To: mathgroup at smc.vnet.net
- Subject: [mg66012] Help on simplifying symbolic sum?
- From: travellingfish at googlemail.com
- Date: Thu, 27 Apr 2006 02:25:53 -0400 (EDT)
- Sender: owner-wri-mathgroup at wolfram.com
Dear All,
I want to syplify some symbolic sum, such like the following one:
2nSum[a[i]^2, {i,1,n}] - 2(Sum[a[i], {i,1,n}])^2
Is should be simplifyed to Sum[(a[i]-a[j])^2, {i,1,n}, {j,1,n}].
Could anybody give me some hints about how to do it? Thanks a lot!
Best wishes!
Martin.