Invertibility of symmetric random matrices

Invertibility of symmetric random matrices
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对称随机矩阵的可逆性

DOI:
10.1002/rsa.20429
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发表时间:
2011
影响因子:
1
通讯作者:
R. Vershynin
R. Vershynin
中科院分区:
数学3区
文献类型:
--
作者:
R. Vershynin

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我们研究n×n对称随机矩阵H,可能是离散的,具有iid对角上元素。我们证明了H是奇异的,概率至多为exp(-nc),并且||H−1||时间复杂度O(n)此外,H的谱在最佳尺度o(n−1/2)上是离域的。这些结果改进了Costello,Tao和Vu的多项式奇异性界,并且推广了Tao和Vu以及Erdös,Schlein和Yau的结果,直到常数因子。版权所有© 2012 Wiley Periodicals,Inc.随机结构算法,44,135 - 182,2014
We study n×n symmetric random matrices H, possibly discrete, with iid above‐diagonal entries. We show that H is singular with probability at most exp(−nc) , and ||H−1||=O(n) . Furthermore, the spectrum of H is delocalized on the optimal scale o(n−1/2) . These results improve upon a polynomial singularity bound due to Costello, Tao and Vu, and they generalize, up to constant factors, results of Tao and Vu, and Erdös, Schlein and Yau.Copyright © 2012 Wiley Periodicals, Inc. Random Struct. Alg., 44, 135‐182, 2014