Matrix concentration inequalities and free probability
Matrix concentration inequalities and free probability
复制标题
矩阵集中不等式和自由概率
DOI:
10.1007/s00222-023-01204-6
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发表时间:
2023
影响因子:
3.1
通讯作者:
van Handel, Ramon
中科院分区:
文献类型:
--
作者:
Bandeira, Afonso S.;Boedihardjo, March T.;van Handel, Ramon
A central tool in the study of nonhomogeneous random matrices, the noncommutative Khintchine inequality, yields a nonasymptotic bound on the spectral norm of general Gaussian random matriceswhereare independent standard Gaussian variables andare matrix coefficients. This bound exhibits a logarithmic dependence on dimension that is sharp when the matricescommute, but often proves to be suboptimal in the presence of noncommutativity. In this paper, we develop nonasymptotic bounds on the spectrum of arbitrary Gaussian random matrices that can capture noncommutativity. These bounds quantify the degree to which the spectrum ofis captured by that of a noncommutative modelthat arises from free probability theory. This “intrinsic freeness” phenomenon provides a powerful tool for the study of various questions that are outside the reach of classical methods of random matrix theory. Our nonasymptotic bounds are easily applicable in concrete situations, and yield sharp results in examples where the noncommutative Khintchine inequality is suboptimal. When combined with a linearization argument, our bounds imply strong asymptotic freeness for a remarkably general class of Gaussian random matrix models that may be very sparse, have dependent entries, and lack any special symmetries. When combined with a universality principle, our bounds extend beyond the Gaussian setting to general sums of independent random matrices.
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DOI:
10.1090/surv/089
发表时间:
2001
期刊:
--
影响因子:
--
作者:
M. Ledoux
通讯作者:
M. Ledoux
DOI:
--
发表时间:
2015
期刊:
影响因子:
--
作者:
J. Tropp
通讯作者:
J. Tropp
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
U. Haagerup;Hanne Schultz;S. Thorbjørnsen
通讯作者:
S. Thorbjørnsen
影响因子:
1.4
作者:
Cai, T. Tony;Han, Rungang;Zhang, Anru R.
通讯作者:
Zhang, Anru R.
影响因子:
1.5
作者:
Koltchinskii, Vladimir;Lounici, Karim
通讯作者:
Lounici, Karim