Block-modified Wishart matrices and free Poisson laws
Block-modified Wishart matrices and free Poisson laws
复制标题
分块修改的 Wishart 矩阵和自由泊松定律
DOI:
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发表时间:
2012
期刊:
影响因子:
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通讯作者:
I. Nechita
中科院分区:
文献类型:
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作者:
T. Banica;I. Nechita
We study the random matrices of type $ ilde{W}=(idotimesvarphi)W$, where $W$ is a complex Wishart matrix of parameters $(dn,dm)$, and $varphi:M_n(mathbb C) o M_n(mathbb C)$ is a self-adjoint linear map. We prove that, under suitable assumptions, we have the $d oinfty$ eigenvalue distribution formula $delta m ilde{W}simpi_{mn
ho}oxtimes
u$, where $
ho$ is the law of $varphi$, viewed as a square matrix, $pi$ is the free Poisson law, $
u$ is the law of $D=varphi(1)$, and $delta=tr(D)$.