The articles in this volume are an outgrowth of an International Confer ence in Intersection Theory that took place in Bologna, Italy (December 1997). In a some

This book consists of five chapters presenting problems of current research in mathematics, with its history and development, current state, and possible future

An accessible introduction to the intersection theory of punctured holomorphic curves and its applications in topology.

This volume contains papers which are based primarily on talks given at an inter national conference on Algorithmic Problems in Groups and Semigroups held at th