Proposition cha_max_le_case {H : complete_heyting_algebra} {x y z : H} (p : x ≤ z) (q : y ≤ z) : (x ∨ y) ≤ z. Proof. exact (Lmax_le_case H x y z p q). Qed.
Require Import UniMath.Foundations.All. Require Import UniMath.MoreFoundations.All. Require Import UniMath.OrderTheory.Lattice.Lattice. Require Import UniMath.OrderTheory.Lattice.Bounded. Require Import UniMath.OrderTheory.Lattice.Heyting.