TY - GEN A1 - Grötschel, Martin T1 - My Favorite Theorem: Characterizations of Perfect Graphs N2 - This paper summarizes and discusses various characterizations of perfect graphs and mentions some open problems in this area. T3 - ZIB-Report - SC-99-17 KW - graph theory KW - perfect graphs KW - integer programming Y1 - 1999 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-4053 ER -