Option variable
sumexpand
Default value: false
false
When sumexpand is true, products of sums and exponentiated sums simplify to nested sums.
true
See also .
Examples:
(%i1) sumexpand: true$ (%i2) sum (f (i), i, 0, m) * sum (g (j), j, 0, n); m n ==== ==== \ \ (%o2) > > f(i1) g(i2) / / ==== ==== i1 = 0 i2 = 0 (%i3) sum (f (i), i, 0, m)^2; m m ==== ==== \ \ (%o3) > > f(i3) f(i4) / / ==== ==== i3 = 0 i4 = 0