About: http://webisa.webdatacommons.org/162777261

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	A perfect graph is a graph such that each induced subgraph's chromatic number is equal to its clique number. share|improve this answer edited Apr 19 '10 at 22:18
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net