Automatically generating sums in Mathematica?

This works with symbols for variables as well, e.g. SumProductf, {{a, b}}, {{a, {1, 2}}, {b, {0}}}. – Janus Nov 11 '10 at 9:22 +1 Specifying the fixed and free variables in this way makes thing easier. – belisarius Nov 11 '10 at 11:38 thanks, that's neat!

– Yaroslav Bulatov Nov 11 '10 at 20:23 @Yaroslaw Does your edit imply that my code is unreadable -- just because it contains such substrings as , # & /@ {##}) &) @@@? ;) You just can't beat Mathematica for job security code. – Janus Nov 11 '10 at 2:04 I was OK up to 5th Apply :P – Yaroslav Bulatov Nov 11 '10 at 4:01.

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