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arXiv 1605.05082cs.SC
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混合创造性望远镜的有效算法

Efficient Algorithms for Mixed Creative Telescoping

Alin Bostan, Louis Dumont, Bruno Salvy

摘要:

创造性伸缩是一个强大的计算机代数范例-由Doron Zeilberger在90年代发起-用于处理带参数的定积分和求和。我们解决了混合连续离散的情况下,并专注于双变量超几何超指数项的整合。我们设计了一个新的创造性的伸缩算法操作这一类的输入,基于一个厄米特样的减少过程。新算法有两个很好的特点:它是有效的,它提供了一个合适的表示输入,最小阶望远镜。它的分析揭示了它生产的望远镜尺寸的严格限制。

英文摘要:

Creative telescoping is a powerful computer algebra paradigm -initiated by Doron Zeilberger in the 90's- for dealing with definite integrals and sums with parameters. We address the mixed continuous-discrete case, and focus on the integration of bivariate hypergeometric-hyperexponential terms. We design a new creative telescoping algorithm operating on this class of inputs, based on a Hermite-like reduction procedure. The new algorithm has two nice features: it is efficient and it delivers, for a suitable representation of the input, a minimal-order telescoper. Its analysis reveals tight bounds on the sizes of the telescoper it produces.

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