fact: Definition extension_functor_prod {A B A' B'} (f : A -> A') (g : B -> B') (P : A' * B' -> Type) (ef : forall b', ExtendableAlong 1 f (fun a' => P (a',b'))) (eg : forall a', ExtendableAlong 1 g (fun b' => P (a',b'))) (s : forall z, P (functor_prod f g z)) : ExtensionAlong (functor_prod f g) P s.
imports: HoTT.Basics HoTT.Types Equiv.PathSplit PathAny Cubical.DPath Cubical.DPathSquare Colimits.Coeq Colimits.MappingCylinder