Rootfinding by fitting rational functions
Author:
F. M. Larkin
Journal:
Math. Comp. 35 (1980), 803816
MSC:
Primary 65H05
MathSciNet review:
572858
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Abstract: A tabular, recursive method is presented for the computation of a sequence of abscissae designed to converge to a simple zero of an analytic function. The key to the method is an efficient means for evaluating the zeros of a sequence of rational functions, having linear numerators, fitted to information previously computed. Regional and asymptotic convergence properties of the method are described. Conditions sufficient to ensure convergence are derived, and it is shown that asymptotically quadratic convergence can be achieved, at the cost of only a moderate amount of "overhead" computation.
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Additional Information
DOI:
http://dx.doi.org/10.1090/S00255718198005728582
PII:
S 00255718(1980)05728582
Article copyright:
© Copyright 1980 American Mathematical Society
