Quantile-based Random Kaczmarz for corrupted linear systems of equations
Quantile-based Random Kaczmarz for corrupted linear systems of equations
复制标题
用于损坏线性方程组的基于分位数的随机 Kaczmarz
DOI:
10.1093/imaiai/iaab029
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发表时间:
2022
期刊:
影响因子:
--
通讯作者:
Steinerberger, Stefan
中科院分区:
文献类型:
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作者:
Steinerberger, Stefan
We consider linear systemswhereconsists of normalized rows,, and where up toentries ofhave been corrupted (possibly by arbitrarily large numbers). Haddock, Needell, Rebrova & Swartworth propose a quantile-based Random Kaczmarz method and show that for certain random matricesit converges with high likelihood to the true solution. We prove a deterministic version by constructing, for any matrix, a numbersuch that there is convergence for all perturbations with. Assuming a random matrix heuristic, this proves convergence for tall Gaussian matrices with up tocorruption (a number that can likely be improved).