Chebyshev approximations for the psi function
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- by W. J. Cody, Anthony J. Strecok and Henry C. Thacher PDF
- Math. Comp. 27 (1973), 123-127 Request permission
Abstract:
Rational Chebyshev approximations to the psi (digamma) function are presented for $.5 \leqq x \leqq 3.0$, and $3.0 \leqq x$. Maximum relative errors range down to the order of ${10^{ - 20}}$.References
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Additional Information
- © Copyright 1973 American Mathematical Society
- Journal: Math. Comp. 27 (1973), 123-127
- MSC: Primary 65D15
- DOI: https://doi.org/10.1090/S0025-5718-1973-0326986-3
- MathSciNet review: 0326986