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arXiv 1402.4755math.NAcs.NA
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在最小非共振条件下对振荡哈密顿系统数值积分器的长期分析

Long-term analysis of numerical integrators for oscillatory Hamiltonian systems under minimal non-resonance conditions

Umeå universitet(于默奥大学);TU Berlin(柏林工业大学);Université de Genève(日内瓦大学);Universität Tübingen(蒂宾根大学)

David Cohen, Ludwig Gauckler, Ernst Hairer, Christian Lubich

AI总结:

研究在最小非共振条件下,振荡哈密顿微分方程的三角和修改三角积分器在长时间尺度上的近保能量特性,不依赖频率间的非共振条件。

摘要:

对于具有一个或多个常数高频的振荡哈密顿微分方程,三角和修改三角积分器在覆盖任意步长负幂的时间尺度上近似保全总能量和振荡能量。这要求步长与频率之间的非共振条件,但与以往结果不同,本研究不需要频率间的非共振条件。证明使用了适当修改频率的调制傅里叶展开。

英文摘要:

For trigonometric and modified trigonometric integrators applied to oscillatory Hamiltonian differential equations with one or several constant high frequencies, near-conservation of the total and oscillatory energies are shown over time scales that cover arbitrary negative powers of the step size. This requires non-resonance conditions between the step size and the frequencies, but in contrast to previous results the results do not require any non-resonance conditions among the frequencies. The proof uses modulated Fourier expansions with appropriately modified frequencies.

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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