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[Merged by Bors] - fix: add deprecation alias #13693

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[Merged by Bors] - fix: add deprecation alias #13693

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3 changes: 3 additions & 0 deletions Mathlib/RingTheory/IntegralDomain.lean
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Expand Up @@ -192,6 +192,9 @@ end EuclideanDivision

variable [Fintype G]

@[deprecated (since := "2024-06-10")]
alias card_fiber_eq_of_mem_range := MonoidHom.card_fiber_eq_of_mem_range

/-- In an integral domain, a sum indexed by a nontrivial homomorphism from a finite group is zero.
-/
theorem sum_hom_units_eq_zero (f : G →* R) (hf : f ≠ 1) : ∑ g : G, f g = 0 := by
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