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Astérisque, published by the Société Mathématique de France, consists of monographs, lecture notes, and conference or seminar proceedings. It is sold in the current year as separate issues or as a journal subscription. The AMS distributes Astérisque in the United States, Canada, and Mexico. Orders from other countries should be sent to the SMF, Maison de la SMF, case 916-Luminy-F-13288 Marseille cedex 09, France, or to Institut Henri Poincaré, 11 rue Pierre et Marie Curie, 75231 Paris cedex 05, France. Members of SMF may purchase single back issues at a 30% discount from list price. (ISSN 0303-1179) Softcover.