Print version: Summer School Geometric and Topological Methods for Quantum Field Theory. Geometric and topological methods for quantum field theory : Summer School on Geometric and Topological Methods for Quantum Field Theory, July 11-29, 2005, Villa de Leyva, Colombia. Providence, Rhode Island : American Mathematical Society, [2007] xi, 255 pages ; 26 cm. Contemporary mathematics ; 434 ISBN 9780821840627