{a a' : A} (b : B) (p : a = a') : ap joinl p @ (jglue a' b) = jglue a b. Proof. destruct p. apply concat_1p. 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.