Module: Mathlib.CategoryTheory.Limits.Preserves.Presheaf

Goal state before:
pp: C : Type u
inst✝⁴ : SmallCategory C
inst✝³ : HasFiniteColimits C
A : Cᵒᵖ ⥤ Type u
J : Type
inst✝² : SmallCategory J
inst✝¹ : FinCategory J
K : J ⥤ Cᵒᵖ
inst✝ : IsFiltered (CostructuredArrow yoneda A)
⊢ (((Presheaf.isColimitTautologicalCocone A).coconePointUniqueUpToIso
              (colimit.isColimit (CostructuredArrow.proj yoneda A ⋙ yoneda))).app
          (limit K)).hom ≫
      (colimitObjIsoColimitCompEvaluation (CostructuredArrow.proj yoneda A ⋙ yoneda) (limit K)).hom ≫
        (HasColimit.isoOfNatIso
              ((CostructuredArrow.proj yoneda A).associator yoneda ((evaluation Cᵒᵖ (Type u)).obj (limit K)))).hom ≫
          (HasColimit.isoOfNatIso (isoAux A K)).hom ≫
            (HasColimit.isoOfNatIso
                  (preservesLimitIso
                    (coyoneda ⋙
                      (whiskeringLeft (CostructuredArrow yoneda A) C (Type u)).obj (CostructuredArrow.proj yoneda A))
                    K)).hom ≫
              (HasColimit.isoOfNatIso (HasLimit.isoOfNatIso (functorToInterchangeIso A K).symm)).hom ≫
                (colimitLimitIso (functorToInterchange A K)).hom ≫
                  (HasLimit.isoOfNatIso (HasColimit.isoOfNatIso (flipFunctorToInterchange A K))).hom ≫
                    (HasLimit.isoOfNatIso
                          (colimitCompWhiskeringLeftIsoCompColimit (CostructuredArrow.proj yoneda A ⋙ yoneda) K)).hom ≫
                      (HasLimit.isoOfNatIso
                          (K.isoWhiskerLeft
                            ((colimit.isColimit (CostructuredArrow.proj yoneda A ⋙ yoneda)).coconePointUniqueUpToIso
                              (Presheaf.isColimitTautologicalCocone A)))).hom =
    limit.post K A

Tactic:
Eq.comm,

Goal state after:
C : Type u
inst✝⁴ : SmallCategory C
inst✝³ : HasFiniteColimits C
A : Cᵒᵖ ⥤ Type u
J : Type
inst✝² : SmallCategory J
inst✝¹ : FinCategory J
K : J ⥤ Cᵒᵖ
inst✝ : IsFiltered (CostructuredArrow yoneda A)
⊢ limit.post K A =
    (((Presheaf.isColimitTautologicalCocone A).coconePointUniqueUpToIso
              (colimit.isColimit (CostructuredArrow.proj yoneda A ⋙ yoneda))).app
          (limit K)).hom ≫
      (colimitObjIsoColimitCompEvaluation (CostructuredArrow.proj yoneda A ⋙ yoneda) (limit K)).hom ≫
        (HasColimit.isoOfNatIso
              ((CostructuredArrow.proj yoneda A).associator yoneda ((evaluation Cᵒᵖ (Type u)).obj (limit K)))).hom ≫
          (HasColimit.isoOfNatIso (isoAux A K)).hom ≫
            (HasColimit.isoOfNatIso
                  (preservesLimitIso
                    (coyoneda ⋙
                      (whiskeringLeft (CostructuredArrow yoneda A) C (Type u)).obj (CostructuredArrow.proj yoneda A))
                    K)).hom ≫
              (HasColimit.isoOfNatIso (HasLimit.isoOfNatIso (functorToInterchangeIso A K).symm)).hom ≫
                (colimitLimitIso (functorToInterchange A K)).hom ≫
                  (HasLimit.isoOfNatIso (HasColimit.isoOfNatIso (flipFunctorToInterchange A K))).hom ≫
                    (HasLimit.isoOfNatIso
                          (colimitCompWhiskeringLeftIsoCompColimit (CostructuredArrow.proj yoneda A ⋙ yoneda) K)).hom ≫
                      (HasLimit.isoOfNatIso
                          (K.isoWhiskerLeft
                            ((colimit.isColimit (CostructuredArrow.proj yoneda A ⋙ yoneda)).coconePointUniqueUpToIso
                              (Presheaf.isColimitTautologicalCocone A)))).hom