David Dorman           Professor and Chair of Mathematics       Department of Mathematics       Middlebury College       Warner Hall       Middlebury, VT 05753, USA          Phone:1- 802-443-5554            Fax:1-802-443-2080            E-mail: dorman_AT_middlebury.edu (Change the _AT_ to @.)            Office: Warner Hall 308          Office Hours: Monday and Wednesday 3:30pm - 5pm