Update LeanCamCombi/ProbLYM.lean

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

Author: ctchou

LeanCamCombi/ProbLYM.lean

@@ -143,7 +143,7 @@ instance (s : Finset α) :
     DecidablePred fun f ↦ (IsPrefix s f) := by
   intro f ; exact Classical.propDecidable ((fun f ↦ IsPrefix s f) f)
 
-def SetPrefix (s : Finset α) : Finset (Numbering α) :=
+def Prefixes (s : Finset α) : Finset (Numbering α) :=
   {f | IsPrefix s f}
 
 theorem set_prefix_card (s : Finset α) :