These lectures were developed by John Louie during Spring semester 1995. Please contact him by sending e-mail to firstname.lastname@example.org if you have questions or comments. For students who do not have regular access to the Internet, but have a Mac or Windows computer with at least 10 megabytes of disk space, these lectures are available on floppy disk for a small dupication fee. Disks for the Macintosh are also available on reserve in the MSM Library on campus. You can log in to the Library to check on their availability. Also, read the instructions with the disks.