Definition k_opp_prebilattice {X : hSet} (b : prebilattice X) := dual_prebilattice (t_opp_prebilattice (dual_prebilattice b)).
Require Import UniMath.Algebra.BinaryOperations. Require Import UniMath.OrderTheory.Lattice.Lattice. Require Import UniMath.OrderTheory.Lattice.Bounded.