{A B} (a : A) (b : B) : ap (join_sym A B) (jglue a b) = (jglue b a)^ := Join_rec_beta_jglue _ _ _ _ _.
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.