Sparse spectral methods for partial differential equations on spherical caps

Sparse spectral methods for partial differential equations on spherical caps
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球冠偏微分方程的稀疏谱方法

DOI:
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发表时间:
2020
影响因子:
--
通讯作者:
S. Olver
S. Olver
中科院分区:
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文献类型:
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作者:
Ben Snowball;S. Olver

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近年来,求解偏微分方程的稀疏谱方法已被导出,使用的经典正交多项式(OP)的区间,圆盘,圆盘片和三角形的层次。在这项工作中,我们扩展的方法,非经典的多变量OP的球冠层次。偏微分算子的离散化项可以有效地使用(非经典)单变量OP的公式计算。我们证明了偏微分方程的结果,涉及球面拉普拉斯算子和双调和算子,显示谱收敛与离散化,可以很好地利用一个简单的预处理条件。
In recent years, sparse spectral methods for solving partial differential equations have been derived using hierarchies of classical orthogonal polynomials (OPs) on intervals, disks, disk-slices and triangles. In this work, we extend the methodology to a hierarchy of non-classical multivariate OPs on spherical caps. The entries of discretizations of partial differential operators can be effectively computed using formulae in terms of (non-classical) univariate OPs. We demonstrate the results on partial differential equations involving the spherical Laplacian and biharmonic operators, showing spectral convergence with discretizations that can be made well conditioned using a simple preconditioner.
DOI: 10.1137/19m1245888
发表时间: 2019-01
期刊: SIAM J. Sci. Comput.
影响因子: --
作者:
S. Olver;Alex Townsend;G. Vasil
通讯作者: S. Olver;Alex Townsend;G. Vasil
DOI: 10.48550/arxiv.1707.00855
发表时间: 2017
期刊: --
影响因子: --
作者:
Shipton J
通讯作者: Shipton J