… data or alter the iteration in some way or, if desired, stop the iteration altogether. The accuracy of the solution and the ability to control round-off errors will depend, in part, upon the way in which the numbers are handled in the computer. In the past it was necessary to en…

…blications Chairs, Adri`a de Gispert and Fabrice Lef`evre who put this volume together. We are grateful to Rich Gerber and the START team who always responded to our questions quickly, and helped us manage the large number of submissions smoothly. Thanks are due to the local orga…

…and and IBM, USA in May, 2005. Scientists from both or- ganizations will work together using the huge computational capacity of IBM's Blue Gene supercomputer to create a detailed model of the circuitry in the neocortex - the largest and most complex part of the human brain. The n…