DirectSum.id_apply

∀ {M : Type v} {ι : Type u_1} [inst : AddCommMonoid M] [inst_1 : Unique ι] (x : DirectSum ι fun x => M),
  (DirectSum.id M ι) x = x default

Defined in: Mathlib.Algebra.DirectSum.Basic
Cited by: 1 results in Mathlib
Foundations: Depth 91 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: AddCommMonoid Unique

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