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Part of the book series: International Series of Numerical Mathematics ((ISNM,volume 30))

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Abstract

For a compact region B of the complex plane let H(B) denote the class of functions f continuous on B and holomorphic on int B. The problem of determining the best uniform polynomial approximation for a given function f∈H(B) is studied. In the first part a descent algorithm is presented, which solves the problem on a discrete subset on the boundary of B. Using this algorithm in the second part an ascent algorithm is derived, which converges to the best approximation on the boundary of B, which is at the same time the best approximation on B.

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Referenzen

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© 1976 Springer Basel AG

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Klotz, V. (1976). Ein Aufstiegsverfahren zur Konstruktion Polynomialer Minimallösungen in der Komplexen Ebene. In: Collatz, L., Werner, H., Meinardus, G. (eds) Numerische Methoden der Approximationstheorie/Numerical Methods of Approximation Theory. International Series of Numerical Mathematics, vol 30. Birkhäuser, Basel. https://doi.org/10.1007/978-3-0348-7692-6_12

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  • DOI: https://doi.org/10.1007/978-3-0348-7692-6_12

  • Publisher Name: Birkhäuser, Basel

  • Print ISBN: 978-3-7643-0824-7

  • Online ISBN: 978-3-0348-7692-6

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