Geometry and Physics ATIYAH80 A workshop celebrating the 80th birthday of Sir Michael Atiyah 20 - 22 April, 2009, University of Edinburgh © Juliet Wood Further Information: http://www.icms.org.uk/workshops/Atiyah80 Honorary Speakers Fritz Hirzebruch (Bonn) Isadore Singer (MIT) Invited Speakers Edward Witten (IAS, Princeton) Dusa McDuff (Stony Brook/Barnard) Robbert Dijkgraaf (Amsterdam) Tom Bridgeland (Sheffield) Frances Kirwan (Oxford) Paul Seidel (MIT) Nigel Hitchin (Oxford) Cumrun Vafa (Harvard) Mike Hopkins (Harvard) Graeme Segal (Oxford) Peter Higgs (Edinburgh) Simon Donaldson (London) David Saxon (Glasgow) TRINITY COLLEGE CAMBRIDGE