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arxiv: 1412.2230 · v1 · pith:J2T5JDE2new · submitted 2014-12-06 · 🧮 math.SP

Interior eigenvalue density of Jordan matrices with random perturbations

classification 🧮 math.SP
keywords eigenvaluejordanblockcircleclosedensityinteriorlarge
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We study the eigenvalue distribution of a large Jordan block subject to a small random Gaussian perturbation. A result by E.B. Davies and M. Hager shows that as the dimension of the matrix gets large, with probability close to $1$, most of the eigenvalues are close to a circle. We study the expected eigenvalue density of the perturbed Jordan block in the interior of that circle and give a precise asymptotic description.

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