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On the k-th root in circular arithmetic

Über die k-te Wurzel in der Kreisarithmetik

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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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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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