Finset.sum_le_one_iff

∀ {α : Type u_2} {s : Finset α} {f : α → ℕ},
  ∑ x ∈ s, f x ≤ 1 ↔ ∀ (x y : α), x ∈ s → y ∈ s → f x ≠ 0 → f y ≠ 0 → x = y ∧ f x = 1

Defined in: Mathlib.Algebra.Order.BigOperators.Group.Finset
Cited by: 1 results in Mathlib
Foundations: Depth 68 from the axioms · uses propext, Classical.choice, Quot.sound

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