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Sparse General Wigner-type Matrices: Local Law and Eigenvector Delocalization
Ioana Dumitriu, Yizhe Zhu · 2018-08-23 · via math.PR updates on arXiv.org

We prove a local law and eigenvector delocalization for general Wigner-type matrices. Our methods allow us to get the best possible interval length and optimal eigenvector delocalization in the dense case, and the first results of such kind for the sparse case down to $p=\frac{g(n)\log n}{n}$ with $g(n)\to\infty$. We specialize our results to the case of the Stochastic Block Model, and we also obtain a local law for the case when the number of classes is unbounded.

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