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Title: On the robust Newton’s method with the Mann iteration and the artistic patterns from its dynamics
Authors: Gdawiec, Krzysztof
Kotarski, Wiesław
Lisowska, Agnieszka
Keywords: Robust Newton method; Mann iteration; Polynomiography; Dynamics; Artistic patterns
Issue Date: 2021
Citation: "Nonlinear Dynamics" Vol. 104 (2021), s. 297-331
Abstract: There are two main aims of this paper. The first one is to show some improvement of the Robust Newton's Method (RNM) introduced recently by Kalantari. The RNM is a generalisation of the well-known Newton's root finding method. Since the base method is undefined at critical points, the RNM allows working also at such points. In this paper, we improve the RNM method by applying the Mann iteration instead of the standard Picard iteration. This leads to an essential decrease in the number of root finding steps without visible destroying the sharp boundaries among the basins of attractions presented in polynomiographs. Furthermore, we investigate visually the dynamics of the RNM with the Mann iteration together with the basins of attraction for varying Mann's iteration parameter with the help of polynomiographs for several polynomials. The second aim of this paper is to present the intriguing polynomiographs obtained from the dynamics of the RNM with the Mann iteration under various sequences used in this iteration. The obtained polynomiographs differ considerably from the ones obtained with the RNM and are interesting from the artistic perspective. Moreover, they can easily find applications in wallpaper or fabric design.
DOI: 10.1007/s11071-021-06306-5
ISSN: 0924-090X
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