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- W2575142993 abstract "We present formulas for accurate numerical conversion between functions represented by multiwavelets and their multipole/local expansions with respect to the kernel of the form, $e^{lambda r}/r$. The conversion is essential for the application of fast multipole methods for functions represented by multiwavelets. The corresponding separated kernels exhibit near-singular behaviors at large $lambda$. Moreover, a multiwavelet basis function oscillates more wildly as its degree increases. These characteristics in combination render any brute-force approach based on numerical quadratures impractical. Our approach utilizes the series expansions of the modified spherical Bessel functions and the Cartesian expansions of solid harmonics so that the multipole-multiwavelet conversion matrix can be evaluated like a special function. The result is a quadrature-free, fast, reliable, and machine precision accurate scheme to compute the conversion matrix with predictable sparsity patterns." @default.
- W2575142993 created "2017-01-26" @default.
- W2575142993 creator A5054457050 @default.
- W2575142993 date "2012-11-26" @default.
- W2575142993 modified "2023-09-27" @default.
- W2575142993 title "An accurate and quadrature-free evaluation of multipole expansion of functions represented by multiwavelets" @default.
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- W2575142993 hasPublicationYear "2012" @default.
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