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Computing over the Reals: Where Turing Meets Newton

Lenore Blum

The author explains how the notions of the computation and computational complexity for binary Turing machines can be extended to machines computing over real numbers with approximation and round-off.
(pp. 1024)
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Comme Appelé du Néant--As If Summoned from the Void: The Life of Alexandre Grothendieck

Allyn Jackson

The life and mathematics of one of the most influential living twentieth-century mathematicians is explored. This is the first part of a two-part article.
(pp. 1038)
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