Office of Corporate Relations
Celebrating our Sesquicentennial 1867-2017

Four Color Theorem Festival

The Department of Mathematics will celebrate the 40th anniversary of the proof of the Four Color Theorem with a multi-day event November 2-4, 2017 celebrating the mathematical, historical and cultural significance of Appel and Haken’s achievement. In 1976, University of Illinois mathematicians Kenneth Appel and Wolfgang Haken announced the solution to the Four Color Problem which conjectures that four is the smallest number of colors needed to color the regions of an arbitrary map in such a manner that any two adjacent countries are painted with different colors. The Appel-Haken Four Color Theorem is a landmark result in geometry, graph and network theory, and computer science.