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Theorem finset.prod_sum

Modification history

2020-07-22 10:18
src/algebra/big_operators/basic.lean
refactor(algebra/big_operators): split file, reduce imports (#3495) …
Modified finset.prod_sumView on Github →
2020-04-07 03:42
src/algebra/big_operators.lean
chore(algebra/big_operators): drop some `decidable_eq` assumptions (#2332) …
Modified finset.prod_sumView on Github →
2018-04-13 19:25
algebra/big_operators.lean
feat(algebra/big_operators): add prod_sum (equating the product over a sum to the sum of all combinations)
Added finset.prod_sumView on Github →