{A B C A' B' C' A'' B'' C''} (f : A -> A') (g : B -> B') (h : C -> C') (f' : A' -> A'') (g' : B' -> B'') (h' : C' -> C'') : functor_trijoin (f' o f) (g' o g) (h' o h) == functor_trijoin f' g' h' o functor_trijoin f g h. Proof. symmetry. nrapply trijoin_rec_functor_trijoin. Defined.
Require Import Basics Types.Paths WildCat Join.Core HoTT.Tactics.