The secant method and divided differences Holder continuous
Applied Mathematics and Computation
MPFR: A multiple-precision binary floating-point library with correct rounding
ACM Transactions on Mathematical Software (TOMS)
Some variants of Ostrowski's method with seventh-order convergence
Journal of Computational and Applied Mathematics
Three-step iterative methods with eighth-order convergence for solving nonlinear equations
Journal of Computational and Applied Mathematics
On an iterative algorithm with superquadratic convergence for solving nonlinear operator equations
Journal of Computational and Applied Mathematics
Convergence and numerical analysis of a family of two-step steffensen's methods
Computers & Mathematics with Applications
Letter to the editor: Frozen divided difference scheme for solving systems of nonlinear equations
Journal of Computational and Applied Mathematics
Steffensen type methods for solving nonlinear equations
Journal of Computational and Applied Mathematics
On the local convergence of a family of two-step iterative methods for solving nonlinear equations
Journal of Computational and Applied Mathematics
Efficient Jarratt-like methods for solving systems of nonlinear equations
Calcolo: a quarterly on numerical analysis and theory of computation
Hi-index | 7.29 |
A development of an inverse first-order divided difference operator for functions of several variables is presented. Two generalized derivative-free algorithms built up from Ostrowski's method for solving systems of nonlinear equations are written and analyzed. A direct computation of the local order of convergence for these variants of Ostrowski's method is given. In order to preserve the local order of convergence, any divided difference operator is not valid. Two counterexamples of computation of a classical divided difference operator without preserving the order are presented. A rigorous study to know a priori if the new method will preserve the order of the original modified method is presented. The conclusion is that this fact does not depend on the method but on the systems of equations and if the associated divided difference verifies a particular condition. A new divided difference operator solving this problem is proposed. Furthermore, a computation that approximates the order of convergence is generated for the examples and it confirms in a numerical way that the order of the methods is well deduced. This study can be applied directly to other Newton's type methods where derivatives are approximated by divided differences.