fact: Definition O_functor_2homotopy {A B : Type} {f g : A -> B} (p q : f == g) (r : p == q) : O_functor_homotopy f g p == O_functor_homotopy f g q.
imports: HoTT.Basics HoTT.Types Equiv.BiInv Extensions HProp HFiber NullHomotopy Limits.Pullback PathAny Colimits.Pushout