fact: Definition vcomp_lunitor {a b : C} {f g : C⟦a, b⟧} (x : f ==> g) : (identity a ◃ x) • idto2mor (id_left g) = idto2mor (id_left f) • x := pr1 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 (pr2 C))))))))) _ _ _ _ x.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Univalence