### Bjorn Poonen

The tenth problem of Hilbert's famous problems of 1900 asked for an algorithm for the existence of an integral root of a multivariable integral polynomial. The author discusses the concepts behind Matiyasevich's negative answer to the problem, other refinements, and current research on related problems.

(pp. 344)

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### Steve Batterson

Hubert A. Newton was the Professor of Mathematics when Yale University began the first Ph.D. program in America, and was the thesis advisor of E. H. Moore, "the father of American mathematics". The author reviews Newton's scientific life and role in the beginnings of mathematical research in America.

(pp. 352)

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