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This document presents a new pseudo-spectral method using the discrete cosine transform to address problems with the existing method using the discrete Fourier transform. Specifically, when values on both sides of a sequence differ significantly, the discrete Fourier transform method results in oscillatory approximations due to its periodicity assumption. The proposed method uses the discrete cosine transform, which assumes symmetric circular periodicity and allows sequences to be symmetrically extended, im

Author

mela

Language

EN