DirectSum.id

(M : Type v) →
  (ι : optParam (Type u_1) PUnit.{u_1 + 1}) → [inst : AddCommMonoid M] → [Unique ι] → (DirectSum ι fun x => M) ≃+ M

The natural equivalence between ⨁ _ : ι, M and M when Unique ι.

Defined in: Mathlib.Algebra.DirectSum.Basic
Cited by: 2 results in Mathlib
Foundations: Depth 89 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: AddCommMonoid Unique

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