fact: Definition yoneda_isretr_0gpd {A : Type} `{Is1Cat A} (a : A) (F : A^op -> ZeroGpd) `{!Is0Functor F, !Is1Functor F} (alpha : yon_0gpd a $=> F) {alnat : Is1Natural (yon_0gpd a) F alpha} (b : A) : yoneda_0gpd a F (un_yoneda_0gpd a F alpha) b $== alpha b := opyoneda_isretr_0gpd (A:=A^op) a F alpha b.
imports: Basics.Overture Basics.Tactics WildCat.Core WildCat.Equiv WildCat.Universe WildCat.Opposite WildCat.FunctorCat WildCat.NatTrans WildCat.Prod WildCat.ZeroGroupoid