DSpace Collection:
http://hdl.handle.net/2117/3603
Thu, 17 Apr 2014 16:31:55 GMT2014-04-17T16:31:55Zwebmaster.bupc@upc.eduUniversitat Politècnica de Catalunya. Servei de Biblioteques i DocumentaciónoA technique to composite a modified Newton's method for solving nonlinear equations
http://hdl.handle.net/2117/12477
Title: A technique to composite a modified Newton's method for solving nonlinear equations
Authors: Grau Sánchez, Miguel; Díaz Barrero, José Luis
Abstract: A zero-finding technique for solving nonlinear equations more efficiently than they usually are with traditional iterative methods in which the order of convergence is
improved is presented. The key idea in deriving this procedure is to compose a
given iterative method with a modified Newton’s method that introduces just one
evaluation of the function. To carry out this procedure some classical methods with
different orders of convergence are used to obtain root-finders with higher efficiency
index.
Description: Nova tècnica que permet construir mètodes iteratius d'ordre alt.Thu, 05 May 2011 11:44:52 GMThttp://hdl.handle.net/2117/124772011-05-05T11:44:52ZGrau Sánchez, Miguel; Díaz Barrero, José LuisnoA zero-finding technique for solving nonlinear equations more efficiently than they usually are with traditional iterative methods in which the order of convergence is
improved is presented. The key idea in deriving this procedure is to compose a
given iterative method with a modified Newton’s method that introduces just one
evaluation of the function. To carry out this procedure some classical methods with
different orders of convergence are used to obtain root-finders with higher efficiency
index.On computational order of convergence of some multi-precision solvers of nonlinear systems of equations
http://hdl.handle.net/2117/12475
Title: On computational order of convergence of some multi-precision solvers of nonlinear systems of equations
Authors: Grau Sánchez, Miguel; Grau Gotés, Mª Ángela; Díaz Barrero, José Luis
Abstract: In this paper the local order of convergence used in iterative methods to solve nonlinear systems of equations is revisited, where shorter alternative analytic proofs of the order based on developments of multilineal functions are shown. Most important, an adaptive multi-precision arithmetics is used hereof, where in each step the length of the mantissa is defined independently of the knowledge of the root.
Furthermore, generalizations of the one dimensional case to m-dimensions of three approximations of computational order of convergence are defined. Examples illustrating the previous results are given.
Description: Report d'un treball de recerca on es presenten noves tècniques de càlcul de l'ordre de convergència amb una aritmètica adaptativa.Thu, 05 May 2011 11:25:05 GMThttp://hdl.handle.net/2117/124752011-05-05T11:25:05ZGrau Sánchez, Miguel; Grau Gotés, Mª Ángela; Díaz Barrero, José LuisnoIn this paper the local order of convergence used in iterative methods to solve nonlinear systems of equations is revisited, where shorter alternative analytic proofs of the order based on developments of multilineal functions are shown. Most important, an adaptive multi-precision arithmetics is used hereof, where in each step the length of the mantissa is defined independently of the knowledge of the root.
Furthermore, generalizations of the one dimensional case to m-dimensions of three approximations of computational order of convergence are defined. Examples illustrating the previous results are given.