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Convergence and spectral analysis of the Frontini-Sormani family of multipoint third order methods from quadrature rule

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Abstract

Point of attraction theory is an important tool to analyze the local convergence of iterative methods for solving systems of nonlinear equations. In this work, we prove a generalized form of Ortega-Rheinbolt result based on point of attraction theory. The new result guarantees that the solution of the nonlinear system is a point of attraction of iterative scheme, especially multipoint iterations. We then apply it to study the attraction theorem of the Frontini-Sormani family of multipoint third order methods from Quadrature Rule. Error estimates are given and compared with existing ones. We also obtain the radius of convergence of the special members of the family. Two numerical examples are provided to illustrate the theory. Further, a spectral analysis of the Discrete Fourier Transform of the numerical errors is conducted in order to find the best method of the family. The convergence and the spectral analysis of a multistep version of one of the special member of the family are studied.

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Correspondence to M. Z. Dauhoo.

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The work of the first author is partly supported by Tertiary Education Commission and University of Mauritius.

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Babajee, D.K.R., Dauhoo, M.Z. Convergence and spectral analysis of the Frontini-Sormani family of multipoint third order methods from quadrature rule. Numer Algor 53, 467–484 (2010). https://doi.org/10.1007/s11075-009-9314-z

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  • DOI: https://doi.org/10.1007/s11075-009-9314-z

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