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Almost-optimal bulk regularity conditions in the CLT for Wigner matrices

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arxiv 2204.03419 v1 pith:PXST6PIU submitted 2022-04-07 math.PR

Almost-optimal bulk regularity conditions in the CLT for Wigner matrices

classification math.PR
keywords functionsregularityspectralvarepsilonvarphibulkdistributionlinear
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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We consider linear spectral statistics of the form $\mathrm{tr} ( \varphi (H))$ for test functions $\varphi$ of low regularity and Wigner matrices $H$ with smooth entry distribution. We show that for functions $\varphi$ in the Sobolev space $H^{1/2+\varepsilon}$ or the space $C^{1/2+\varepsilon}$, that are supported within the spectral bulk of the semicircle distribution, these linear spectral statistics have asymptotic Gaussian fluctuations with the same variance as in the CLT for functions of higher regularity, for any $\varepsilon >0$.

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Cited by 8 Pith papers

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