Last, but most importantly, I wish to thank my wife, Lalitha, for all the
wonderful years, for teaching me regularization and being able to share in
the excitement of new ideas. Also, thanks to Anjali and Sandhya without
whose help the project would have concluded a lot sooner, but would have
been no fun at all. You make it all worth it.xii ACKNOWLEDGMENTSfm_01_4273.qxd 7/26/04 2:20 PM Page xii