Edge fluctuations of eigenvalues of Wigner matrices

Details Edge fluctuations of eigenvalues of Wigner matrices Edge fluctuations of eigenvalues of Wigner matrices

2012-03-09

arxiv.org/abs/1203.2115v2

Mathematics

Probability

16 pages, some minor corrections

Scientific paper

We establish a moderate deviation principle (MDP) for the number of eigenvalues of a Wigner matrix in an interval close to the edge of the spectrum. Moreover we prove a MDP for the $i$th largest eigenvalue close to the edge. The proof relies on fine asymptotics of the variance of the eigenvalue counting function of GUE matrices due to Gustavsson. The extension to large families of Wigner matrices is based on the Tao and Vu Four Moment Theorem. Possible extensions to other random matrix ensembles are commented.

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