SIGACT News

Lane Hemaspaandra's Complexity Column in the September SIGACT News has an interesting article by Marcus Schaefer and Chris Umans on problems complete in higher levels of the polynomial-time hierarchy. Also of interest for complexity theorists, Bill Gasarch's Book Review Column has a joint review of Computability and Complexity Theory by Homer and Selman and The Complexity Theory Companion by Hemaspaandra and Ogihara.