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arXiv math-ph/0409035math-phmath.MP
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时序算子代数与微分方程的形式解

The Chronological Operator Algebra and Formal Solutions of Differential Equations

Yu. N. Kosovtsov

摘要:

该文致力于研究两个问题.首先,我们得到了不同类型微分方程的Dyson时间算子指数形式的显式精确形式解.这使得我们可以直接处理方程的解,而不是方程本身。其次,我们详细地考虑了时序算子的代数性质,得到了一个广泛的算子恒等式族。该方法的主要优点是至少可以像处理普通函数一样处理形式解。我们从一般的观点考察了线性和非线性的常微分方程的任何阶,系统的常微分方程,线性算子常微分方程,线性偏微分方程和系统的线性偏微分方程的一个未知函数。本文以数学物理中重要的微分方程为例,说明了所涉及的方法和技巧。

英文摘要:

The aim of this paper is twofold. First, we obtain the explicit exact formal solutions of differential equations of different types in the form with Dyson chronological operator exponents. This allows us to deal directly with the solutions to the equations rather than the equations themselves. Second, we consider in detail the algebraic properties of chronological operators, yielding an extensive family of operator identities. The main advantage of the approach is to handle the formal solutions at least as well as ordinary functions. We examine from a general standpoint linear and non-linear ODEs of any order, systems of ODEs, linear operator ODEs, linear PDEs and systems of linear PDEs for one unknown function. The methods and techniques involved are demonstrated on examples from important differential equations of mathematical physics.

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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