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.
(pp. 848)
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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.
(pp. 860)
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Mina Spiegel Rees (1902--1997)

Judy Green, Jeanne LaDuke, Saunders Mac Lane, and Uta C. Merzbach