随机矩阵的可逆性:酉扰动和正交扰动
概率论
2014-03-05 v2
摘要
我们证明,任何固定方阵D被随机酉矩阵扰动后,以高概率是良好可逆的。对于随机正交矩阵的扰动也有类似结果;唯一的显著例外是当D接近正交时。作为应用,这些结果完全消除了Guionnet、Krishnapur和Zeitouni的单环定理中一个难以验证的条件。
引用
@article{arxiv.1206.5180,
title = {Invertibility of random matrices: unitary and orthogonal perturbations},
author = {Mark Rudelson and Roman Vershynin},
journal= {arXiv preprint arXiv:1206.5180},
year = {2014}
}
备注
46 pages. A more general result on orthogonal perturbations of complex matrices added. It rectified an inaccuracy in application to Single Ring Theorem for orthogonal matrices