| Literature DB >> 11607087 |
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.Entities:
Year: 1990 PMID： 11607087 PMCID： PMC54181 DOI： 10.1073/pnas.87.12.4685
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205