fact: Definition comp_mor_of_street_fib_nat_trans {B₁ B₂ B₃ E₁ E₂ E₃ : category} {P₁ : E₁ ⟶ B₁} {P₂ : E₂ ⟶ B₂} {P₃ : E₃ ⟶ B₃} (F₁ : mor_of_street_fib P₁ P₂) (F₂ : mor_of_street_fib P₂ P₃) : P₁ ∙ (mor_of_street_fib_base F₁ ∙ mor_of_street_fib_base F₂) ⟹ (mor_of_street_fib_total F₁ ∙ mor_of_street_fib_total F₂) ∙ P₃.
imports: UniMath.Foundations.All UniMath.MoreFoundations.All UniMath.CategoryTheory.Core.Categories UniMath.CategoryTheory.Core.Isos UniMath.CategoryTheory.Core.Univalence UniMath.CategoryTheory.Core.Functors UniMath.CategoryTheory.Core.NaturalTransformations UniMath.CategoryTheory.DisplayedCats.Core UniMath.CategoryTheory.DisplayedCats.Total UniMath.CategoryTheory.DisplayedCats.Fibrations