`BookProof.IrreversibleDynamics.finite_injective_iff_surjective` {α : Type*} [Finite α] (f : α → α) : Function.Injective f ↔ Function.Surjective f

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`BookProof.IrreversibleDynamics.finite_injective_iff_surjective` {α : Type*} [Finite α] (f : α → α) : Function.Injective f ↔ Function.Surjective f · Prove2Me