Some fourth-order nonlinear solvers with closed formulae for multiple roots
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In this paper, we present six new fourth-order methods with closed formulae for finding multiple roots of nonlinear equations. The first four of them require one-function and three-derivative evaluation per iteration. The last two require one-function and twoderivative evaluation per iteration. Several numerical examples are given to show the performance of the presented methods compared with some known methods.
The article of record as published may be located at http://dx.doi.org/10.1016/j.camwa.2009.08.066