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ESAIM: P&S, 1998, Vol. 2, pp. 123-134
DOI: 10.1051/ps:1998104
Large deviations from the circular law
Gérard Ben Arous1 and Ofer Zeitouni21 (Gerard.Benarous@epfl.ch)
2 (zeitouni@ee.technion.ac.il)
Abstract
We prove a full large deviations principle, in the scale N2,
for the empirical measure of the eigenvalues of an N x N
(non self-adjoint) matrix composed of i.i.d. zero mean random
variables with variance N-1. The (good) rate function which
governs this rate function possesses as unique minimizer the
circular law, providing an alternative proof of convergence to
the latter. The techniques are related to recent work by Ben
Arous and Guionnet, who treat the self-adjoint case. A crucial
role is played by precise determinant computations due to Edelman
and to Lehmann and Sommers.
Résumé
On montre un principe de grandes déviations, en échelle N2, pour
la loi empirique des valeurs propres d'une matrice de taille N x N
composée de variables gaussiennes indépendantes ayant une moyenne
nulle et une variance N-1. La (bonne) fonction de taux qui
contrôle ce principe de grandes déviations a comme minimisante
unique la loi circulaire. Les techniques sont reliées à un
travail récent de Ben Arous et Guionnet, qui ont traité le
cas auto-adjoint. Un rôle important est joué par des calculs
précis de déterminants, faits par Edelman et par Lehmann
et Sommers.
Key words: Large deviations / circular law / non commutative entropy.
© EDP Sciences, SMAI 1998
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