Four Deviations Suffice for Rank 1 Matrices
Four Deviations Suffice for Rank 1 Matrices
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对于 1 阶矩阵来说,四个偏差就足够了
DOI:
10.1016/j.aim.2020.107366
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Zhao Song
中科院分区:
文献类型:
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作者:
Rasmus Kyng;K. Luh;Zhao Song
We prove a matrix discrepancy bound that strengthens the famous Kadison-Singer result of Marcus, Spielman, and Srivastava. Consider any independent scalar random variables ξ 1,…, ξ n with finite support, eg {±1} or {0, 1}-valued random variables, or some combination thereof. Let u 1,…, u n∈ m and σ 2=‖∑ i= 1 n Var [ξ i](u i u i⁎) 2‖. Then there exists a choice of outcomes ε 1,…, ε n in the support of ξ 1,…, ξ n st‖∑ i= 1 n E [ξ i] u i u i⁎−∑ i= 1 n ε i u i u i⁎‖≤ 4 σ. A simple consequence of our result is an improvement of a Lyapunov-type theorem of Akemann and Weaver.
DOI:
10.1109/focs.2015.24
发表时间:
2015-08
期刊:
2015 IEEE 56th Annual Symposium on Foundations of Computer Science
影响因子:
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作者:
Y. Lee;He Sun
通讯作者:
Y. Lee;He Sun