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arXiv 1208.4765math.NAcs.NA
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局部线性化-龙格库塔方法:一类用于动力系统的A-稳定显式积分器

Local Linearization-Runge Kutta Methods: a class of A-stable explicit integrators for dynamical systems

IMPA(巴西数学研究所);Universidad de Ciencias Informáticas(古巴信息科学大学);CIMFAV-DEUV, Facultad de Ciencias, Universidad de Valparaiso(瓦尔帕莱索大学理学院);Instituto de Cibernética, Matemática y Física(古巴计算机、数学与物理研究所);Montreal Neurological Institute, McGill University(麦吉尔大学蒙特利尔神经学研究所)

H. de la Cruz, R. J. Biscay, J. C. Jimenez, F. Carbonell

AI总结:

本文提出一类通过将原方程解拆分为线性部分和辅助部分,分别采用局部线性化方案(保证A-稳定性)和显式龙格库塔方案(保证高阶)构造的高阶A-稳定显式积分器,并给出收敛性、动力学性质及高效实现。

摘要:

理论上研究了一种构造常微分方程(ODE)高阶A-稳定显式积分器的新方法。基本思想是,在每个时间步,将原方程的解拆分为两部分:一个线性常微分方程的解加上一个辅助ODE的解。前者通过局部线性化方案求解,以确保A-稳定性,而后者可以用任何现有方案近似,最好是高阶显式龙格库塔方案。给出了这类新格式的收敛性和动力学性质的结果,以及高效数值实现的一些提示。详细推导了该类的一个具体格式,并在代表不同类型动力学的多种ODE积分中,将其性能与一些Matlab代码进行了比较。

英文摘要:

A new approach for the construction of high order A-stable explicit integrators for ordinary differential equations (ODEs) is theoretically studied. Basically, the integrators are obtained by splitting, at each time step, the solution of the original equation in two parts: the solution of a linear ordinary differential equation plus the solution of an auxiliary ODE. The first one is solved by a Local Linearization scheme in such a way that A-stability is ensured, while the second one can be approximated by any extant scheme, preferably a high order explicit Runge-Kutta scheme. Results on the convergence and dynamical properties of this new class of schemes are given, as well as some hints for their efficient numerical implementation. An specific scheme of this new class is derived in detail, and its performance is compared with some Matlab codes in the integration of a variety of ODEs representing different types of dynamics.

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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