fact: Definition ooextendable_functor_sigma_id {A} {P Q : A -> Type} (f : forall a, P a -> Q a) (C : sig Q -> Type) (ef : forall a, ooExtendableAlong (f a) (fun v => C (a;v))) : ooExtendableAlong (functor_sigma idmap f) C := fun n => extendable_functor_sigma_id n f C (fun a => ef a n).
imports: HoTT.Basics HoTT.Types Equiv.PathSplit PathAny Cubical.DPath Cubical.DPathSquare Colimits.Coeq Colimits.MappingCylinder