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arXiv 1502.05003math.PRmath.FAmath.MG
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关于高斯随机矩阵的谱范数

On the spectral norm of Gaussian random matrices

Ramon van Handel

摘要:

令$X$是具有独立但不相同分布的高斯元素的$d\times d$对称随机矩阵。它已证明了由Lataiti {a}的谱范数的$X$总是相同的顺序作为最大的欧几里德范数的行。这个猜想的一个积极的决议将提供一个敏锐的理解概率机制,控制谱范数的非齐次高斯随机矩阵。本文建立了关于$\sqrt{\log\log d}$阶维数因子的猜想.此外,无量纲的界限是最佳的领导秩序,并建立在特殊情况下的猜想。这些结果的证明揭示了潜在的高斯过程的几何意义。

英文摘要:

Let $X$ be a $d\times d$ symmetric random matrix with independent but non-identically distributed Gaussian entries. It has been conjectured by Latał{a} that the spectral norm of $X$ is always of the same order as the largest Euclidean norm of its rows. A positive resolution of this conjecture would provide a sharp understanding of the probabilistic mechanisms that control the spectral norm of inhomogeneous Gaussian random matrices. This paper establishes the conjecture up to a dimensional factor of order $\sqrt{\log\log d}$. Moreover, dimension-free bounds are developed that are optimal to leading order and that establish the conjecture in special cases. The proofs of these results shed significant light on the geometry of the underlying Gaussian processes.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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