Proposition cha_and_monotone_l {H : complete_heyting_algebra} {x₁ x₂ y : H} (p : x₁ ≤ x₂) : (x₁ ∧ y) ≤ (x₂ ∧ y). Proof. use (cha_and_monotone p). apply cha_le_refl. Qed.
Require Import UniMath.MoreFoundations.All. Require Import UniMath.Algebra.BinaryOperations. Require Import UniMath.OrderTheory.Lattice.Lattice. Require Import UniMath.OrderTheory.Lattice.Bounded. Require Import UniMath.OrderTheory.Lattice.Heyting. Require Import UniMath.OrderTheory.Lattice.CompleteHeyting.