An efficient trust region method for solving nonlinear systems of equations

AuthorsZeinab Saeidian
Conference Title50th annual Iranian mathematics conference
Holding Date of Conference2019-08-26
PresentationSPEECH
Conference LevelInternational Conferences

Abstract

In this paper‎, ‎we propose a nomonotone adaptive trust region method for solving nonlinear systems of equalities‎.
‎This method combines an efficient nonmonotone technique with an adaptive‎
‎strategy based on the Esmaeili's adaptive technique‎. Becuase of the more efficiency, our new method is equiped by hybric scheme of adaptive and classic trust region method. ‎This adaptive rule ensures us taht the size of the radius is not too large or too small‎. ‎In order to decrese the number of function evaluation and the number of iterations‎, ‎the trust region ratio is based on the efficient modification of the nonmonotone technique of Grippo‎. ‎The global convergence of the new method is established under some standard assumptions‎.