Update LeanCamCombi/ProbLYM.lean

Co-authored-by: Yaël Dillies <[email protected]>

Author: ctchou

LeanCamCombi/ProbLYM.lean

@@ -49,7 +49,7 @@ theorem cardNumbering : card (Numbering α) = (card α).factorial := by
   exact Fintype.card_equiv (Fintype.equivFinOfCardEq rfl)
 
 omit [Fintype α] in
-theorem numbering_on_card (s : Finset α) : card (NumberingOn s) = s.card.factorial := by
+theorem card_numberingOn (s : Finset α) : card (NumberingOn s) = s.card.factorial := by
   simp only [NumberingOn]
   have h1 : card {x // x ∈ s} = card (Fin s.card) := by simp
   have h2 : {x // x ∈ s} ≃ (Fin s.card) := by exact Fintype.equivOfCardEq h1