### Michael C. Mackey and Moisés Santillán

The authors review some of the historical relation between physics, mathematics, and the biological sciences and consider the future role of this interaction.

(pp. 832)

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### Solomon Friedberg

The author reports on some experiences in teaching mathematics graduate students how to teach, in particular by using a case study method.

(pp. 842)

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### Frank Morgan

The subject is Riemannian manifolds whose volume and area elements are weighted by a density function; an example is Euclidean space weighted by the Gaussian probability density function, which is known as Gauss space and used in the study of Brownian motion. The author considers the generalization to these manifolds of volume estimates and isoperimetric inequalities.

(pp. 853)

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