arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 1607.01088math.NAcs.NA
收藏

后向误差与$\star$-塞弗方程的小样本条件估计

Backward Errors and Small Sample Condition Estimation for $\star$-Sylveter Equations

Northeast Normal University(东北师范大学);Monash University(莫纳什大学)

Huai-An Diao, Hong Yan, Eric King-wah Chu

AI总结:

本文基于小条件估计法,提出估算$\star$-塞弗方程范数、混合和分量条件数的算法,并定义了具有精确且易计算上界的新分量后向误差。数值实验表明,该算法在分量扰动下能可靠估计,新上界在大或小扰动下对良好或中等劣化方程有效。

摘要:

本文采用分量扰动分析法研究$\star$-塞弗方程。基于小条件估计(SCE),我们设计了估算$\star$-塞弗方程范数、混合和分量条件数的算法。我们还定义了具有精确且易计算上界的分量后向误差。数值实验表明,我们的算法在分量扰动下产生可靠估计,且新推导的分量后向误差上界在大或小扰动下对良好或中等劣化$\star$-塞弗方程有效。

英文摘要:

In this paper, we adopt a componentwise perturbation analysis for $\star$-Sylvester equations. Based on the small condition estimation (SCE), we devise the algorithms to estimate normwise, mixed and componentwise condition numbers for $\star$-Sylvester equations. We also define a componentwise backward error with a sharp and easily computable bound. Numerical examples illustrate that our algorithm under componentwise perturbations produces reliable estimates, and the new derived computable bound for the componentwise backward error is sharp and reliable for well conditioned and moderate ill-conditioned $\star$-Sylvester equations under large or small perturbations.

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。

↑