Welcome to Al Lehnen's Web Site

I am a former mathematics instructor at Madison Area Technical College in Madison, Wisconsin USA:  1701 Wright Street, Madison, WI 53704 ; Email alehnen@madisoncollege.edu or aplehnen@execpc.com

The graphic above was generated as a parametric surface using the Java Program CalcPlot3D, authored by Professor Paul Seeburger of  Monroe Community College in Brighton, New York.


Biographical Information


Schedule in Retirement


The Axioms of Humility:
A. Just because I don't understand an idea, doesn’t mean that it is wrong.
B. Just because I do understand an idea, doesn’t mean that it is right.