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arXiv 2405.07537math.NAcs.NA
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随机矩阵计算的统计舍入误差分析

Statistical Rounding Error Analysis for Random Matrix Computations

Yiming Fang, Li Chen

AI总结:

本文提出了一种针对随机矩阵计算的统计舍入误差分析方法,通过假设相对误差为独立随机变量推导出期望和方差的近似闭式表达式,数值实验表明其比传统最坏情况界限至少紧致两个数量级。

摘要:

传统的舍入误差分析提供了具有相关失败概率的最坏情况界限,并忽略了舍入误差的统计性质。在本文中,我们为随机矩阵计算开发了一种新的统计舍入误差分析。此类计算在无线通信、信号处理和机器学习领域有众多应用。通过假设相对误差为独立随机变量,我们推导了随机矩阵各种关键计算中舍入误差期望和方差的近似闭式表达式。数值实验验证了我们推导的准确性,并表明我们的解析表达式通常比替代的最坏情况界限至少紧致两个数量级,以内积为例进行了说明。

英文摘要:

The conventional rounding error analysis provides worst-case bounds with an associated failure probability and ignores the statistical property of the rounding errors. In this paper, we develop a new statistical rounding error analysis for random matrix computations. Such computations have numerous applications in the field of wireless communications, signal processing, and machine learning. By assuming the relative errors are independent random variables, we derive the approximate closed-form expressions for the expectation and variance of the rounding errors in various key computations for random matrices. Numerical experiments validate the accuracy of our derivations and demonstrate that our analytical expressions are generally at least two orders of magnitude tighter than alternative worst-case bounds, exemplified through the inner products.

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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