(A B : Type) : join_sym A B == equiv_join_sym' A B. Proof. symmetry. rapply (fmap join_rec). bundle_joinrecpath; intros; cbn. refine (ap inverse _). apply ap_idmap. Defined.
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.