Includes bibliographical references.

The problem of classifying automorphic representations of classical groups ; A survey of results relating to Giuga's conjecture on primality ; Solving equations by the decrease principle ; Differential equations for linear shells: Comparison between intrinsic and classical models ; From theory to theory ; Partial differential equations with differential constraints ; Bispectral operators of rank 1 and dual isomonodromic deformations ; Metaphor and models in science and art ; Some algebraic geometry of integrable systems ; My encounters-as a physicist-with mathematics ; Quelques points d'histoire des series de Fourier ; Exterior differential systems and normal forms of parabolic systems ; Aspects combinatoires des equations de Bethe ; Metric dimension and statistical estimation ; Mordell-Weil problem for cubic surfaces ; Non-vanishing of functions ; Decomposition of tensor products of the fundamental representations of _8 ; The one-loop graviton scattering amplitude in string theory ; Consequences of an Abelian family symmetry ; Natural dualities and clones ; The early introduction of dynamic programming into computational biology ; On character generators ; Quantum transport in solids ; Families of transitive primitive maximal simple Lie subalgebras of textnormal diff_n ; Shape boundary derivative for an elastic membrane