Abstract
The Ostrowski theorem is a classical result which ensures the attraction of all the successive approximations xk+1 = G(xk) near a fixed point x*. Different conditions [ultimately on the magnitude of G′(x*)] provide lower bounds for the convergence order of the process as a whole.
In this paper, we consider only one such sequence and we characterize its high q-convergence orders in terms of some spectral elements of G′(x*); we obtain that the set of trajectories with high q-convergence orders is restricted to some affine subspaces, regardless of the nonlinearity of G.
We analyze also the stability of the successive approximations under perturbation assumptions.
Authors
Emil Cătinaş
(Tiberiu Popoviciu Institute of Numerical Analysis, Romanian Academy)
Keywords
fixed point; successive approximations; nonlinear system of equations in Rn; inexact Newton method; perturbed Newton method; linear systems of equation in Rn; residual; local convergence; q-convergence orders.
Cite this paper as:
E. Cătinaş, On the superlinear convergence of the successive approximations method, J. Optim. Theory Appl., 113 (2002) no. 3, pp. 473-485
doi: 10.1023/A:1015304720071
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About this paper
Publisher Name
Kluwer Academic Publishers-Plenum Publishers
Print ISSN
0022-3239
Online ISSN
1573-2878
MR
0022-3239
Online ISSN
1573-2878
Google Scholar citations
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