Comparison of FFT,direct inversion,and conjugate gradient methods for use in pseudo-spectral methods |
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| Authors: | Thomas D. Taylor Richard S. Hirsh Margaret M. Nadworny |
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| Affiliation: | Johns Hopkins University, Applied Physics Laboratory, Laurel, MD 20707, U.S.A. |
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| Abstract: | Direct matrix inversion methods and the conjugate gradient method are compared with the FFT for speed when used in pseudo-spectral calculations. It is demonstrated that in some cases either of these methods is competitive with an FFT. This is especially true when using direct methods in two dimensions. |
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