Finset.sum_multiset_count

∀ {M : Type u_4} [inst : AddCommMonoid M] [inst_1 : DecidableEq M] (s : Multiset M),
  s.sum = ∑ m ∈ s.toFinset, Multiset.count m s • m

Defined in: Mathlib.Algebra.BigOperators.Group.Finset.Basic
Cited by: 3 results in Mathlib
Foundations: Depth 79 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: AddCommMonoid DecidableEq

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