Equiv.Set.sumDiffSubset

{α : Type u_3} → {s t : Set α} → s ⊆ t → [DecidablePred fun x => x ∈ s] → ↑s ⊕ ↑(t \ s) ≃ ↑t

sumDiffSubset s t is the natural equivalence between s ⊕ (t \ s) and t, where s and t are two sets.

Defined in: Mathlib.Logic.Equiv.Set
Cited by: 5 results in Mathlib
Foundations: Depth 59 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: DecidablePred

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