单环定理中的支撑收敛
Support convergence in the single ring theorem
摘要:
研究了非正规方阵A_n=U_nT_nV_n的特征值,其中U_n,V_n独立于Haar分布在酉群和T_n实对角线上.证明了当T_n的特征值的经验测度收敛,且T_n满足一定的技术条件时,所有的特征值都在一个环上.
英文摘要:
We study the eigenvalues of non-normal square matrices of the form A_n=U_nT_nV_n with U_n,V_n independent Haar distributed on the unitary group and T_n real diagonal. We show that when the empirical measure of the eigenvalues of T_n converges, and T_n satisfies some technical conditions, all these eigenvalues lie in a single ring.
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