Toward a unified theory for third R-order iterative methods for operators with unbounded second derivative

  1. Hernández, M.A. 1
  2. Romero, N. 1
  1. 1 Universidad de La Rioja
    info

    Universidad de La Rioja

    Logroño, España

    ROR https://ror.org/0553yr311

Aldizkaria:
Applied Mathematics and Computation

ISSN: 0096-3003

Argitalpen urtea: 2009

Alea: 215

Zenbakia: 6

Orrialdeak: 2248-2261

Mota: Artikulua

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DOI: 10.1016/J.AMC.2009.08.017 SCOPUS: 2-s2.0-70349994124 WoS: WOS:000270972400029 GOOGLE SCHOLAR

Beste argitalpen batzuk: Applied Mathematics and Computation

Lotura duten proiektuak

Regiones de accesibilidad y optimización de procesos iterativos para resolver ecuaciones no lineales. Aplicaciones

2009/00009/001

Laburpena

In this paper, we provide a semilocal convergence analysis for a family of Newton-like methods, which contains the best-known third-order iterative methods for solving a nonlinear equation F (x) = 0 in Banach spaces. It is assumed that the operator F is twice Fréchet differentiable and F″ satisfies a Lipschitz type condition but it is unbounded. By using majorant sequences, we provide sufficient convergence conditions to obtain cubic semilocal convergence. Results on existence and uniqueness of solutions, and error estimates are also given. Finally, a numerical example is provided. © 2009 Elsevier Inc. All rights reserved.