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Approximation by circles

Approximation durch Kreise

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Abstract

The problem considered is to assign a measure of circularity to a given compact set in the plane. The measure adopted is the size of the smallest annulus containing the given set. Two different notions of the size of an annulus, that of area and that of difference of radii are studied.

Zusammenfassung

Das hier untersuchte Problem ist, einer kompakten Menge in der Ebene ein Maß der Kreisförmigkeit zuzuschreiben. Als Maß wird die Größe des kleinsten Kreisringes gewählt, der die gegebene Menge enthält. Zwei verschiedene Größenbegriffe für den Kreisring werden untersucht, nämlich dessen Oberfläche und die Differenz der Radien.

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References

  1. Rivlin, T. J., Shapiro, H. S.: A unified approach to certain problems of approximation and minimization. SIAM Journal9, 670–699 (1961).

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  2. Rivlin, T. J.: The Chebyshev Polynomials. New York: J. Wiley 1974.

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Rivlin, T.J. Approximation by circles. Computing 21, 93–104 (1979). https://doi.org/10.1007/BF02253130

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  • DOI: https://doi.org/10.1007/BF02253130

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