High order nonlinear solver for multiple roots (uncorrected proof)
Johnson, Anthony N.
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A method of order four for finding multiple zeros of nonlinear functions is developed. The method is based on Jarratt’s 4 fifth-order method (for simple roots) and it requires one evaluation of the function and three evaluations of the derivative. The 5 informational efficiency of the method is the same as previously developed schemes of lower order. For the special case of double 6 root, we found a family of fourth-order methods requiring one less derivative. Thus this family is more efficient than all others. All 7 these methods require the knowledge of the multiplicity.
Computers and Mathematics with Applications, 55, (2008), 2012–2017.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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