fact: Definition triangle_v_V (a : A) {b b' : B} (p : b = b') : triangle_v a p^ = (1 @@ ap_V joinr p) @ moveR_pV _ _ _ (triangle_v a p)^.
imports: Basics Types Cubical NullHomotopy Extensions Colimits.Pushout Truncations.Core Truncations.Connectedness Pointed.Core WildCat Spaces.Nat.Core