Fintype.ofSurjective

{α : Type u_1} → {β : Type u_2} → [DecidableEq β] → [Fintype α] → (f : α → β) → Function.Surjective f → Fintype β

If f : α → β is a surjection and α is a fintype, then β is also a fintype.

Defined in: Mathlib.Data.Fintype.OfMap
Cited by: 3 results in Mathlib
Foundations: Depth 77 from the axioms · uses propext, Classical.choice, Quot.sound
Assumes: DecidableEq Fintype

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