(A B P : Type) : joinrecdata_sym B A P $o joinrecdata_sym A B P $== Id _. Proof. intro f; simpl. bundle_joinrecpath. intros a b; simpl. apply inv_V. 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.