fact: Definition yon_faithful_0gpd {A : Type} `{Is1Cat A} (a b : A) (f g : b $-> a) (p : forall (c : A) (h : c $-> b), f $o h $== g $o h) : f $== g := opyon_faithful_0gpd (A:=A^op) b a f g p.
imports: Basics.Overture Basics.Tactics WildCat.Core WildCat.Equiv WildCat.Universe WildCat.Opposite WildCat.FunctorCat WildCat.NatTrans WildCat.Prod WildCat.ZeroGroupoid