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Function fields and random matrices

Published online by Cambridge University Press:  10 November 2010

J. B. Conrey
Affiliation:
American Institute of Mathematics
D. W. Farmer
Affiliation:
American Institute of Mathematics
F. Mezzadri
Affiliation:
University of Bristol
N. C. Snaith
Affiliation:
University of Bristol
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Summary

… le mathématicien qui étudie ces problèmes a l'impression de déchiffrer une inscription trilingue. Dans la première colonne se trouve la théorie riemannienne des fonctions algébriques au sens classique. La troisième colonne, c'est la théorie arithmétique des nombres algébriques. La colonne du milieu est celle dont la découverte est la plus récente; elle contient la théorie des fonctions algébriques sur un corps de Galois. Ces textes sont l'unique source de nos connaissances sur les langues dans lesquels ils sont écrits; de chaque colonne, nous n'avons bien entendu que des fragments; …. Nous savons qu'il y a des grandes différences de sens d'une colonne à l'autre, mais rien ne nous en avertit à l'avance.

A. Weil, “De la métaphysique aux mathématiques” (1960)

The goal of this survey is to give some insight into how well-distributed sets of matrices in classical groups arise from families of L-functions in the context of the middle column of Weil's trilingual inscription, namely function fields of curves over finite fields. The exposition is informal and no proofs are given; rather, our aim is to illustrate what is true by considering key examples.

In the first section, we give the basic definitions and examples of function fields over finite fields and the connection with algebraic curves over function fields. The language is a throwback to Weil's Foundations, which is quite out of fashion but which gives good insight with a minimum of baggage.

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Publisher: Cambridge University Press
Print publication year: 2007

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