Finsupp.uniqueAddEquiv

{ι : Type u_1} → {M : Type u_3} → [inst : AddZeroClass M] → ι → [Subsingleton ι] → (ι →₀ M) ≃+ M

If M is the trivial monoid, then the monoid of finitely supported functions ι →₀ M is is isomorphic to M.

Defined in: Mathlib.Algebra.Group.Finsupp
Cited by: 5 results in Mathlib
Foundations: Depth 65 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: AddZeroClass Subsingleton

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