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SOLUTION OF BOUNDED NONLINEAR SYSTEMS OF EQUATIONS USING HOMOTOPIES WITH INEXACT RESTORATION 

Authors: E. G. Birgin a;  N. Krejicacute b; J. M. Martiacutenez c
Affiliations:   a Department of Computer Science IME-USP, University of Satildeo Paulo, Rua do Matatildeo 1010, Cidade Universitaacuteria, 05508-900, Satildeo Paulo SP, Brazil.
b Institute of Mathematics, University of Novi Sad, Trg Dositeja Obradovicacutea 4, 21000 Novi Sad, Yugoslavia.
c Department of Applied Mathematics, IMECC-UNICAMP, University of Campinas, CP 6065, 13081-970 Campinas SP, Brazil.
DOI: 10.1080/00207160304672
Publication Frequency: 15 issues per year
Published in: journal International Journal of Computer Mathematics, Volume 80, Issue 2 February 2003 , pages 211 - 222
Number of References: 25
Formats available: PDF (English)
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Abstract

Nonlinear systems of equations often represent mathematical models of chemical production processes and other engineering problems. Homotopic techniques (in particular, the bounded homotopies introduced by Paloschi) are used for enhancing convergence to solutions, especially when a good initial estimate is not available. In this paper, the homotopy curve is considered as the feasible set of a mathematical programming problem, where the objective is to find the optimal value of the homotopic parameter. Inexact restoration techniques can then be used to generate approximations in a neighborhood of the homotopy, the size of which is theoretically justified. Numerical examples are given.
Keywords: Nonlinear Programming; Nonlinear Systems; Homotopies; Bounded Homotopies; Homotopy Methods; Inexact Restoration
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