(A B : Type) : Join A B <~> Join B A := equiv_homotopic_inverse (' A B) (join_sym_homotopic A B) (join_sym_homotopic B A).
Require Import Basics Types. Require Import Cubical.DPath Cubical.PathSquare. Require Import NullHomotopy. Require Import Extensions. Require Import Colimits.Pushout. Require Import Truncations.Core Truncations.Connectedness. Require Import Pointed.Core. Require Import WildCat. Require Import Spaces.Nat.Core.