Table of Contents
Featured Articles and Invitations from the AMS
An Update on the Four-Color Theorem
Robin Thomas
The author, with three others, published a greatly simplified proof of the Four-Color Theorem in 1997. Starting with some of the theorem's history, he writes here about equivalent formulations, aspects of the new proof, and progress on some generalizations.
Interview with Shiing Shen Chern
Allyn Jackson and Dieter Kotschick
The eminent geometer S. S. Chern, still active at 86, speaks of his interaction with Élie Cartan, of his proof of the generalized Gauss-Bonnet Theorem, and of various approaches to differential geometry.