Learning Nested Differences of Intersection-Closed Concept Classes.

David P. Helmbold Robert H. Sloan Manfred K. Warmuth Learning Nested Differences of Intersection-Closed Concept Classes. 41-56 1989 COLT http://portal.acm.org/citation.cfm?id=93335.93341 db/conf/colt/colt1989.html#HelmboldSW89