High-Order Iterative Methods Repeating Roots a Constructive Recapitulation  

作　　者：Isaac Fried Isaac Fried(Department of Mathematics, Boston University, Boston, MA, USA)

机构地区：[1]Department of Mathematics, Boston University, Boston, MA, USA

出　　处：《Applied Mathematics》2022年第2期131-146,共16页应用数学（英文）

摘　　要：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.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.

关 键 词：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 

分 类 号：O17[理学—数学]