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Chebychev interpolations of the Gamma and Polygamma Functions and their analytical properties (1605.02776v1)
Published 2 May 2016 in math.CA
Abstract: Chebychev approximations are given for the Gamma and the Polygamma functions in only one contiguous intervall [1..inf] with a definable maximal relative error. The approximations need about three coefficients per decimal until a checked precision of 100 decimal digits.
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