title: Coclosure operators and chromatic polynomials.
abstract: A theorem about closure operators on partially ordered sets is given, and applications to the counting of colorings of graphs according to partition type are derived.
authors.affiliation: Department of Mathematics, The University, Manchester, England.
authors.forename: N
authors.initials: N
authors.lastname: Ray
authors.forename: W
authors.initials: W
authors.lastname: Schmitt