TITLE:
High-Order Iterative Methods Repeating Roots a Constructive Recapitulation
AUTHORS:
Isaac Fried
KEYWORDS:
Roots of Nonlinear Equations, Multiple Roots, Multiplicity Index of a Root, Estimation of the Multiplicity Index of a Root, High-Order Iterative Methods, Root Bracketing, Alternatingly Converging Methods, Contrarily Converging Methods
JOURNAL NAME:
Applied Mathematics,
Vol.13 No.2,
February
18,
2022
ABSTRACT: This paper considers practical, high-order methods for the iterative location of the roots of nonlinear equations, one at a time. Special attention is being paid to algorithms also applicable to multiple roots of initially known and unknown multiplicity. Efficient methods are presented in this note for the evaluation of the multiplicity index of the root being sought. Also reviewed here are super-linear and super-cubic methods that converge contrarily or alternatingly, enabling us, not only to approach the root briskly and confidently but also to actually bound and bracket it as we progress.