On the development of iterative methods for multiple roots
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There are very few optimal fourth order methods for solving nonlinear algebraic equations having roots of multiplicity m. Here we compare 4 such methods, two of which require the evaluation of the (m--1)st root. We will show that such computation does not affect the overall cost of the method.
The article of record as published may be located at http://dx.doi.org/10.1016/j.amc.2013.08.077