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arXiv 2302.08448math.NAcs.NA
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通过无限维带状矩阵分解实现正交多项式的多项式与有理测度修改

Polynomial and rational measure modifications of orthogonal polynomials via infinite-dimensional banded matrix factorizations

Timon S. Gutleb, Sheehan Olver, Richard Mikael Slevinsky

AI总结:

本文提出利用无限维带状矩阵分解的快速算法,以线性复杂度计算正交多项式在多项式或有理测度修改下的连接系数与修改Jacobi矩阵,并构造支持带状微分矩阵的正交多项式族以实现稀疏谱方法。

摘要:

我们描述了快速算法,用于近似计算一族正交多项式与另一族具有多项式或理性修改测度的正交多项式之间的连接系数。该连接系数通过无限维带状矩阵分解进行计算,可用于计算修改后的Jacobi矩阵,且所有计算相对于截断度均具有线性复杂度。我们构造了一族具有修改经典权重的正交多项式,它们支持带状微分矩阵,从而实现了使用修改经典正交多项式的稀疏谱方法。

英文摘要:

We describe fast algorithms for approximating the connection coefficients between a family of orthogonal polynomials and another family with a polynomially or rationally modified measure. The connection coefficients are computed via infinite-dimensional banded matrix factorizations and may be used to compute the modified Jacobi matrices all in linear complexity with respect to the truncation degree. A family of orthogonal polynomials with modified classical weights is constructed that support banded differentiation matrices, enabling sparse spectral methods with modified classical orthogonal 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。

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