Implementation of three-stage Jenkins-Traub algorithm for real polynomials using quadratic iteration.
Jenkins-Traub is a staple of root finding methods and understanding how it works is the main motivation here. The paper being used as reference material can be found here:
A Three-Stage Algorithm for Real Polynomials Using Quadratic Iteration
Implementation based on description from Jenkins and Traub (cited above).
(C) Tim Bright, 2017. MIT License.