fact: Definition functor_hfiber_compose {A B C X Y Z : Type} {k : A -> B} {l : B -> C} {f : A -> X} {g : B -> Y} {h : C -> Z} {i : X -> Y} {j : Y -> Z} (H : i o f == g o k) (K : j o g == h o l) : forall x, functor_hfiber (comm_square_comp' H K) x == (functor_hfiber K (i x)) o (functor_hfiber H x : hfiber f x -> _).
imports: Basics Types Diagrams.CommutativeSquares HSet