Polynomial Root finding
Does anyone know of a numerical/algebraic method to find the largest real root of a polynomial? References are appreciated.
Thank you. 
Re: Polynomial Root finding
Title: Roots of polynomials by ratio of successive derivatives Author(s): Crouse, J. E. (NASA Lewis Research Center, Cleveland, OH, United States); Putt, C. W. (NASA Lewis Research Center, Cleveland, OH, United States) Date: 1972 Citation: NASATND6793

Re: Polynomial Root finding
have a look at "Numerical Recipes"

Re: Polynomial Root finding
Thanks guys,
Let me first explain why I need to solve a polynomial eqn. Reference JFM(2000), vol.415, pp.261284 "A scaledependent dynamic model for LES". I want to solve eqn. (3.14) which is a polynomial of degree 5. But I only need the largest, real, positive root. In the paper they solve this using a NewtonRaphson method. I wanted to know if there is a readymade subroutine that will give me the largest real root. Agg. 
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