The Intermediate Value Theorem is NOT Obvious---and I am Going to Prove It to You.
Stephen M. Walk (smwalk@stcloudstate.edu) earned bachelors and masters degrees from the University of Northern Iowa and a Ph.D. from the University of Notre Dame. He has taught at St. Cloud State University in Minnesota since 1999. His mathematical interests include computability theory and many-valued logic. His non-mathematical time tends to revolve around his three children (who created the art in the background of the photo).