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based on an earlier version of the Wolfram Language.
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gives the economized rational approximation to expr that is good over the interval to , with numerator order m and denominator order n.
  • finds the Padé approximant about the midpoint of the interval to , and then perturbs the approximant with Chebyshev polynomials to reduce the leading coefficient in the error.
  • Mathematica can find the economized rational approximant over the interval to only when it can evaluate power series at the midpoint of the interval.
  • produces a ratio of ordinary polynomial expressions, not a special SeriesData object.