Summary.
A direct method is developed for solving Poisson's equation on an annulus region with Hermite bicubic collocation approximation. In terms of FFT, the operation count is\(O(N^2\log_2 N)\) on an \(N \times N\) mesh.
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Received May 11, 1990 / Revised version received August 19, 1994
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Sun, W. A high order direct method for solving Poisson's equation in a disc . Numer. Math. 70, 501–506 (1995). https://doi.org/10.1007/s002110050131
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DOI: https://doi.org/10.1007/s002110050131