Re: Multiple sum excluding some terms

*To*: mathgroup at smc.vnet.net*Subject*: [mg44103] Re: Multiple sum excluding some terms*From*: bobhanlon at aol.com (Bob Hanlon)*Date*: Thu, 23 Oct 2003 07:14:45 -0400 (EDT)*References*: <bn5dpi$6aa$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

Sum[m[i, j], {j, 1,3}, {i, 1,j-1}]+ Sum[m[i, j], {j, 1,3}, {i, j+1,2}] m(1,2)+m(1,3)+m(2,1)+m(2,3) or slightly shorter Sum[m[i, j], {j, 3}, {i, j-1}]+ Sum[m[i, j], {j, 3}, {i, j+1,2}] m(1,2)+m(1,3)+m(2,1)+m(2,3) Bob Hanlon In article <bn5dpi$6aa$1 at smc.vnet.net>, guillerm at aida.usal.es (Guillermo Sanchez) wrote: << How make a multiple sum (example: Sum[m[i, j], {j, 1, 3}, {i, 1, 2}]) excluding terms i = j? >><BR><BR>