Abstract
The representation of thek-th root of a complex circular intervalZ={c;r} is considered in this paper. Thek-th root is defined by the circular intervals which include the exact regionZ 1/k={z:z k ∈Z}. Two representations are given: (i) the centered inclusive disks\( \cup \{ c^{{1 \mathord{\left/ {\vphantom {1 k}} \right. \kern-\nulldelimiterspace} k}} ; \mathop {\max }\limits_{z \in Z} |z^{{1 \mathord{\left/ {\vphantom {1 k}} \right. \kern-\nulldelimiterspace} k}} - c^{{1 \mathord{\left/ {\vphantom {1 k}} \right. \kern-\nulldelimiterspace} k}} |\} \) and (ii) the diametrical inclusive disks with the diameter which is equal to the diameter of the regionZ 1/k.
Zusammenfassung
In diesem Artikel hat die Darstellung derk-ten Wurzel des komplexen KreisintervallsZ={c;r} übergelegt. Diek-te Wurzel wurde mit den Kreisintervallen definiert, welche das richtige GebietZ 1/k={z:z k ∈Z} einschließen. Zwei Darstellungen sind gegeben: (i) zentrierte inklusive Kreisscheiben\( \cup \{ c^{{1 \mathord{\left/ {\vphantom {1 k}} \right. \kern-\nulldelimiterspace} k}} ; \mathop {\max }\limits_{z \in Z} |z^{{1 \mathord{\left/ {\vphantom {1 k}} \right. \kern-\nulldelimiterspace} k}} - c^{{1 \mathord{\left/ {\vphantom {1 k}} \right. \kern-\nulldelimiterspace} k}} |\} \) und (ii) diametrische inklusive Kreisscheiben mit Diameter wie Diameter des GebietsZ 1/k.
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References
Gargantini, I., Henrici, P.: Circular arithmetic and the determination of polynomial zeros. Numer. Math.18, 305–320 (1972).
Petković, M., Petković, Lj.: On a representation of thek-th root in complex circular arithmetic. In: Interval Mathematics 1980 (Nickel, K., ed.), pp. 473–479. New York: Academic Press 1980.
Petković, Lj., Petković, M.: The representation of complex circular functions using Taylor series. ZAMM61, 661–662 (1981).
Petković, Lj.: On two applications of Taylor series in circular complex arithmetic. Freiburger Intervall-Berichte2, 33–50 (1983).
Petković, M.: On a generalisation of the root iterations for polynomial complex zeros in circular interval arithmetic. Computing27, 37–55 (1981).
Rokne, J., Wu, T.: The circular complex centered form. Computing28, 17–30 (1982).
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Petković, L., Petković, M. On the k-th root in circular arithmetic. Computing 33, 27–35 (1984). https://doi.org/10.1007/BF02243073
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DOI: https://doi.org/10.1007/BF02243073