OrthogonalIdempotents.prod_one_sub

∀ {R : Type u_1} [inst : CommRing R] {I : Type u_3} {e : I → R},
  OrthogonalIdempotents e → ∀ (s : Finset I), ∏ i ∈ s, (1 - e i) = 1 - ∑ i ∈ s, e i

Defined in: Mathlib.RingTheory.Idempotents
Cited by: 2 results in Mathlib
Foundations: Depth 73 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: CommRing

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