arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1306.0612math.NAcs.NA
收藏

快速积分方程方法用于球面上的拉普拉斯-贝尔特里方程

Fast integral equation methods for the Laplace-Beltrami equation on the sphere

Mary Catherine A. Kropinski, Nilima Nigam

AI总结:

本文提出了解决球面上存在多个岛屿的拉普拉斯-贝尔特里方程的快速积分方程方法,通过立体投影将球面映射到复平面上的多连通区域,并利用快速多极子方法求解线性系统,实现O(N)复杂度的计算。

摘要:

本文介绍了用于解决单位球面上存在多个“岛屿”的拉普拉斯-贝尔特里方程的积分方程方法。首先将球面映射到复平面上的多连通区域,然后通过立体投影进行离散化,得到稠密线性系统后,利用快速多极子方法求解,以计算矩阵-向量乘积。该数值方案仅需O(N)次操作,其中N是边界离散化的节点数。该方法在多个示例中得到了验证。

英文摘要:

Integral equation methods for solving the Laplace-Beltrami equation on the unit sphere in the presence of multiple "islands" are presented. The surface of the sphere is first mapped to a multiply-connected region in the complex plane via a stereographic projection. After discretizing the integral equation, the resulting dense linear system is solved iteratively using the fast multipole method for the 2D Coulomb potential in order to calculate the matrix-vector products. This numerical scheme requires only O(N) operations, where $N$ is the number of nodes in the discretization of the boundary. The performance of the method is demonstrated on several examples.

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。

↑