fact: Definition functor2_trijoin {A B C A' B' C'} {f f' : A -> A'} {g g' : B -> B'} {h h' : C -> C'} (p : f == f') (q : g == g') (r : h == h') : functor_trijoin f g h == functor_trijoin f' g' h'.
imports: Basics Types.Paths WildCat Join.Core HoTT.Tactics