Priestley duality for order-preserving maps into distributive lattices

The category of bounded distributive lattices with order-preserving maps is shown to be dually equivalent to the category of Priestley spaces with Priestley multirelations. The Priestley dual space of the ideal lattice L(sigma) of a bounded distributive lattice L is described in terms of the dual space of L. A variant of the Nachbin-Stone-Cech compactification is developed for bitopological and ordered spaces. Let X be a poset and Y an ordered space; X(Y) denotes the poset of continuous order-preserving maps from Y to X with the discrete topology. The Priestley dual of L(P) is determined, where P is a poset and L a bounded distributive lattice.