Professor and Chair, Department of Mathematics
University of Wisconsin-Madison
725 Van Vleck Hall
219 Van Vleck Hall (Chair's Office)
480 Lincoln Drive
Madison, WI 53706-1388
Telephone: (608) 263-3714
Chair's Phone: (608) 263-3051
Fax: (608) 263-8891
E-mail: nagel at math.wisc.edu