fact: Definition cyl_ooextendable {A B} (f : A -> B) (C : Cyl f -> Type) (ext : ooExtendableAlong cyl C) : ooExtendableAlong cyl C := fun n => cyl_extendable n f C (ext n).
imports: HoTT.Basics HoTT.Types Equiv.PathSplit PathAny Cubical.DPath Cubical.DPathSquare Colimits.Coeq Colimits.MappingCylinder