


BROWSE PRINCETON'S SERIES in London Mathematical Society MonographsEdited by Martin Bridson, Ben Green, and Peter SarnakThe London Mathematical Society Monographs Series was established in 1968. Since that time it has published outstanding volumes that have been critically acclaimed by the mathematics community. The LMS and Princeton University Press have united to expand the number of books published annually and to make the series more international in scope. The series embraces all areas of mathematics as well as authors from around the world. The aim of this series is to publish authoritative accounts of current research in mathematics and highquality expository works bringing the reader to the frontiers of research. Of particular interest are topics that have developed rapidly in the last ten years but that have reached a certain level of maturity. Clarity of exposition is important and each book should be accessible to those commencing work in its field. The books are of medium length, usually 250  450 pages, and are published in an attractive hardback version. The manuscripts are usually set in LaTeX by the authors; technical help and advice is available. An additional attraction to authors is that each manuscript has a Reader, knowledgeable in the field, who provides comments on the final manuscript. The original series was founded in 1968 by the Society and Academic Press; the second series was launched by the Society and Oxford University Press in 1983. In January 2003, the series moved to Princeton University Press and all new titles will be published under this imprint. Editorial Board Martin Bridson's research interests lie in geometric group theory, lowdimensional topology, and the study of spaces of nonpositive curvature. He has published two books and is an editor of several mathematical journals. Ben Green works on a variety of questions at the interface of combinatorics, number theory and analysis, an area which he calls "arithmetic combinatorics". He particularly enjoys using the Fourier transform to prove results which, at first sight, appear to have nothing to do with harmonic analysis. Peter Sarnak works in the fields of analysis, number theory, and related mathematical physics. He edits a number of mathematical journals and advanced mathematical monograph series. The London Mathematical Society is the UK's learned society for mathematics. Founded in 1865 for the promotion and extension of mathematical knowledge, the Society is concerned with all branches of mathematics and its applications. It is an independent and selffinancing charity, with a membership of over 2,600 drawn from all parts of the UK and overseas. Its principal activities are the organization of meetings and conferences, the publication of periodicals and books, the provision of financial support for mathematical activities, and the contribution to public debates on issues related to mathematics research and education. It works collaboratively with other mathematical bodies worldwide. It is the UK adhering body to the International Mathematical Union and is a member of the Council for the Mathematical Sciences, which comprises the Institute of Mathematics and its Applications, the Royal Statistical Society together with the London Mathematical Society. Authors interested in submitting a manuscript for consideration can contact any of the editors or send submissions to the Princeton Mathematics Editor, Vickie Kearn. 