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Rational Approximation with a Vanishing Weight Function and with a Fixed Value at Zero
Charles B. Dunham
Mathematics of Computation
Vol. 30, No. 133 (Jan., 1976), pp. 45-47
Published by: American Mathematical Society
Stable URL: http://www.jstor.org/stable/2005428
Page Count: 3
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Chebyshev approximation by ordinary rational functions with respect to a vanishing weight function is considered. A best approximation is characterized by alternation and is unique but may not exist. The problem arises in Kuki's technique for rational approximation with interpolation at zero and with Williams' interpolating rationals.
Mathematics of Computation © 1976 American Mathematical Society