Emergent Mind
Fast convergence to higher multiplicity zeros
(1911.10647)
Published Nov 25, 2019
in
math.NA
and
cs.NA
Abstract
In this paper, the Newton-Anderson method, which results from applying an extrapolation technique known as Anderson acceleration to Newton's method, is shown both analytically and numerically to provide superlinear convergence to non-simple roots of scalar equations. The method requires neither a priori knowledge of the multiplicities of the roots, nor computation of any additional function evaluations or derivatives.
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