This volume contains contributions by participants in the Stable Group seminar at Notre Dame. This seminar began during the 1985-86 Notre Dame Logic Year and continued up to December 1987.
Except for Simon Thomas' paper on expansions of projective spaces, all the papers here are connected in one way or another with stable group theory. This volume contains introductory, expository and research papers in the area and we hope will be of interest to beginners as well as "experts". We cover much of the material in Poizat's book Groupes Stables and go beyond it in some respects (for example Bouscaren's paper on Hrushovski's important group configuration theorem in which the presence of a definable group is recognized from a certain forking configuration). So we hope our volume will serve as a useful complement to Poizat's book.