Partially based on three interviews, this two-part article discusses the extraordinary mathematics of Mikhael Gromov. Part II concentrates on Riemannian geometry and on mm-spaces, a class of measure spaces that generalize Riemannian manifolds. (pp. 326)
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The Data Encryption Standard is the most widely used public cryptosystem in the world. Successfully used for more than twenty years, it has only recently begun to be vulnerable to the power of present-day computers. Landau describes the principles behind this encryption system and the kinds of attacks that are used on it. (pp. 341)
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