Definition t_opp_prebilattice {X : hSet} (b : prebilattice X) := make_prebilattice (dual_lattice (tlattice b)) (klattice b) .
Require Import UniMath.Algebra.BinaryOperations. Require Import UniMath.OrderTheory.Lattice.Lattice. Require Import UniMath.OrderTheory.Lattice.Bounded.