arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1104.4838math-phmath.MP
收藏

二阶有理常微分方程的Darboux方法族的改进

Improving a family of Darboux methods for rational second order ordinary differential equations

L. G. S. Duarte, L. A. C. P. da Mota

摘要:

我们一直致力于分析,理解和解决常微分方程(一阶和二阶)问题的许多方面。正如我们已经广泛提到的,在达布型方法中,我们的方法和求解算法中最昂贵的步骤是确定相关微分算子的达布多项式。在这里,我们将提出一些算法,以大大减少在确定这些所需的达布多项式的时间开销。其中一些是基于对二阶微分方程关于相关微分不变量的一般结构的详细分析。为了进行这种分析,我们产生一个定理的一般形式的微分不变量的达布多项式。

英文摘要:

We have been working in many aspects of the problem of analyzing, understanding and solving ordinary differential equations (first and second order). As we have extensively mentioned, while working in the Darboux type methods, the most costly step of our methods and algorithms of solution is the determination of Darboux polynomials for the associated differential operators. Here, we are going to present some algorithms to greatly reduce the time expenditure in determining these needed Darboux polynomials. Some of them are based on a detailed analysis of the general structure of second order differential equations regarding the associated differential invariants. In order to perform this analysis, we produce a theorem concerning the general form for the differential invariants in terms of the Darboux polynomials.

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。

↑