English
The isomorphism isoWhiskerRight (isoWhiskerRight α F) G equals a composite built from associators and isoWhiskerRight α (F ⋙ G) and the associator inverse.
Русский
Изоморфизм isoWhiskerRight (isoWhiskerRight α F) G равен композиции через ассоциаторы и isoWhiskerRight α (F ⋙ G) и обратный ассоциатор.
LaTeX
$$$\\mathrm{isoWhiskerRight}(\\mathrm{isoWhiskerRight}\\;α\\;F)\\;G = \\mathrm{Functor.associator}\\,\\_\\_\\_ \\; ≪≫ \\; \\mathrm{isoWhiskerRight}\\;α\\,(F\\circ G) \\;≪≫ (\\mathrm{Functor.associator}\\;\\_\\_\\_).symm$$$
Lean4
@[simp, reassoc]
theorem isoWhiskerRight_twice {H K : B ⥤ C} (F : C ⥤ D) (G : D ⥤ E) (α : H ≅ K) :
isoWhiskerRight (isoWhiskerRight α F) G =
Functor.associator _ _ _ ≪≫ isoWhiskerRight α (F ⋙ G) ≪≫ (Functor.associator _ _ _).symm :=
by cat_disch