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arXiv cs/0611041cs.SC
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Groebner基在线性差分方程组中的应用

Groebner Bases Applied to Systems of Linear Difference Equations

V. P. Gerdt

摘要:

在本文中,我们考虑系统的部分(多维)线性差分方程。具体地说,这种系统出现在线性偏微分方程离散化下的科学计算中,以及计算高能物理学中作为多回路费曼积分的递归关系。研究线性差分系统的最通用的算法工具是将其变换为等价的Groebner基形式。我们提出了一个算法,这种转换在Maple中实现。该算法及其实现可用于线性偏微分方程差分格式的自动生成和Feynman积分的约化。给出了一些说明性的例子。

英文摘要:

In this paper we consider systems of partial (multidimensional) linear difference equations. Specifically, such systems arise in scientific computing under discretization of linear partial differential equations and in computational high energy physics as recurrence relations for multiloop Feynman integrals. The most universal algorithmic tool for investigation of linear difference systems is based on their transformation into an equivalent Groebner basis form. We present an algorithm for this transformation implemented in Maple. The algorithm and its implementation can be applied to automatic generation of difference schemes for linear partial differential equations and to reduction of Feynman integrals. Some illustrative examples are given.

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