Re: Multiple sum excluding some terms

*To*: mathgroup at smc.vnet.net*Subject*: [mg44113] Re: Multiple sum excluding some terms*From*: guillerm at aida.usal.es (Guillermo Sanchez)*Date*: Thu, 23 Oct 2003 07:15:05 -0400 (EDT)*References*: <bn5dpi$6aa$1@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

I have realized that this function works fine Sum[If[j == i, 0, m[j, i]], {j, 1, 3}, {i, 1, 2}] guillerm at aida.usal.es (Guillermo Sanchez) wrote in message news:<bn5dpi$6aa$1 at smc.vnet.net>... > Hi friends > > How make a multiple sum (example: Sum[m[i, j], {j, 1, 3}, {i, 1, 2}]) > excluding terms i = j? > > Guillermo Sanchez