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§3.11(i) Minimax Polynomial Approximations… ►If we have a sufficiently close approximation … ►For examples of minimax polynomial approximations to elementary and special functions see Hart et al. (1968). … ► … ►The theory of polynomial minimax approximation given in §3.11(i) can be extended to the case when is replaced by a rational function . …
Hastings (1955) gives several minimax polynomial and rational approximations for , and the auxiliary functions and .
Cody et al. (1971) gives rational approximations for in the form of quotients of polynomials or quotients of Chebyshev series. The ranges covered are , , , . Precision is varied, with a maximum of 20S.