fact: Definition Join_rec {A B P : Type} (P_A : A -> P) (P_B : B -> P) (P_g : forall a b, P_A a = P_B b) : Join A B -> P.
imports: Basics Types Cubical NullHomotopy Extensions Colimits.Pushout Truncations.Core Truncations.Connectedness Pointed.Core WildCat Spaces.Nat.Core