 |
Free and accessible knowledge |
Journal articles
Non-Hermitian random matrices with a variance profile (I): deterministic equivalents and limiting ESDs
Abstract : For each n, let An = (σij) be an n × n deterministic matrix and let Xn = (Xij) be an n × n random matrix with i.i.d. centered entries of unit variance. We study the asymptotic behavior of the empirical spectral distribution µ Y n of the rescaled entry-wise product Yn = 1 √ n σijXij. For our main result we provide a deterministic sequence of probability measures µn, each described by a family of Master Equations, such that the difference µ Y n − µn converges weakly in probability to the zero measure. A key feature of our results is to allow some of the entries σij to vanish, provided that the standard deviation profiles An satisfy a certain quantitative irreducibility property. An important step is to obtain quantitative bounds on the solutions to an associate system of Schwinger-Dyson equations, which we accomplish in the general sparse setting using a novel graphical bootstrap argument.
Cited literature [72 references]
https://hal.archives-ouvertes.fr/hal-02385528
Contributor : Walid Hachem Connect in order to contact the contributor
Submitted on : Thursday, November 28, 2019 - 7:09:03 PM
Last modification on : Saturday, January 15, 2022 - 3:56:33 AM
Long-term archiving on: : Saturday, February 29, 2020 - 8:07:40 PM
Contributor : Walid Hachem Connect in order to contact the contributor
Submitted on : Thursday, November 28, 2019 - 7:09:03 PM
Last modification on : Saturday, January 15, 2022 - 3:56:33 AM
Long-term archiving on: : Saturday, February 29, 2020 - 8:07:40 PM
File
non_hermitian_varprofile.pdf
Files produced by the author(s)