The Australian Journal of Mathematical Analysis and Applications

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Paper's Title:

Traub-Potra-Type Method for Set-Valued Maps


Ioannis K. Argyros and Sad Hilout

Cameron University,
Department of Mathematics Sciences,
Lawton, OK 73505,


Poitiers University,
Laboratoire de Mathematiques et Applications,
Bd. Pierre et Marie Curie, Teleport 2, B.P. 30179,
86962 Futuroscope Chasseneuil Cedex,


We introduce a new iterative method for approximating a locally unique solution of variational inclusions in Banach spaces by using generalized divided differences of the first order. This method extends a method considered by Traub  (in the scalar case) and by Potra  (in the Banach spaces case) for solving nonlinear equations to variational inclusions. An existence-convergence theorem and a radius of convergence are given under some conditions on divided differences operator and Lipschitz-like continuity property of set-valued mappings. The R-order of the method is equal to the unique positive root of a certain cubic equation, which is $1.839..., and as such it compares favorably to related methods such as the Secant method which is only of order $1.618....

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