fact: Definition joinrecdata_fun_sym (A B : Type) : NatEquiv (opyon_0gpd (Join A B)) (opyon_0gpd (Join B A)) := natequiv_compose (join_rec_natequiv B A) (natequiv_compose (joinrecdata_sym_natequiv A B) (join_rec_inv_natequiv A B)).
imports: Basics Types Cubical NullHomotopy Extensions Colimits.Pushout Truncations.Core Truncations.Connectedness Pointed.Core WildCat Spaces.Nat.Core