Comparing Nested Sequences of Leja and PseudoGauss Points to Interpolate in 1D and Solve the Schroedinger Equation in 9D
Comparing Nested Sequences of Leja and PseudoGauss Points to Interpolate in 1D and Solve the Schroedinger Equation in 9D
复制标题
比较 Leja 和伪高斯点的嵌套序列以在一维中插值并求解 9D 中的薛定谔方程
DOI:
10.1007/978-3-319-75426-0_1
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发表时间:
2018
期刊:
影响因子:
--
通讯作者:
T. Carrington
中科院分区:
文献类型:
--
作者:
G. Avila;J. Oettershagen;T. Carrington
In this article, we use nested sets of weighted Leja points, which have previously been studied as interpolation points, as collocation points to solve a 9D vibrational Schroedinger equation. Collocation has the advantage that it obviates the need to compute integrals with quadrature. A multi-dimension sparse grid is built from the Leja points and Hermite-type basis functions by restricting sparse grid levelsicusing ∑cgc(ic) ≤H, wheregc(ic) is a non-decreasing function andHis a parameter that controls the accuracy. Results obtained with Leja points are compared to those obtained with PseudoGauss points. PseudoGauss points are also nested. They are chosen to improve the accuracy of the Gram matrix. With both Leja and PseudoGauss points it is possible to add one point per level. We also compare Lebesgue constants for weighted Leja and PseudoGauss points.
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DOI:
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发表时间:
1999
期刊:
影响因子:
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