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arXiv 0903.1585math.NAcs.NA
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数值复时间积分的几何学

Geometry of Numerical Complex Time Integration

Zentrum Mathematik der Technischen Universität München(慕尼黑工业大学数学中心)

Thorsten Orendt, Jürgen Richter-Gebert, Michael Schmid

AI总结:

从几何角度研究沿复积分路径的龙格-库塔方法,推导出特殊的复时间网格以实现经典超收敛效应,并建立与复系数组合方法的联系。

摘要:

我们从几何角度研究沿复积分路径的龙格-库塔方法。由此推导出特殊的复时间网格,应用于线性自治常微分方程组的积分问题时,可实现经典的超收敛效应。该方法也适用于任意常微分方程。此外,我们将几何推理与复系数组合方法类联系起来。因此,我们的主要目标是引入关于这些方法的新观点。

英文摘要:

We are studying Runge-Kutta methods along complex paths of integration from a geometric point of view. Thereby we derive special complex time grids, which applied to the problem of integrating a linear autonomous system of ordinary differential equations, can be used to achieve a classical superconvergence effect. The approach is also adapted for arbitrary ODEs. Furthermore we draw a connection from our geometric reasoning to the class of composition methods with complex coefficients. Thereby, our main goal is to introduce a new point of view on these methods.

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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