You might start by looking at how it is implemented 
in https://github.com/vtjnash/Polynomial.jl

kl. 17:47:35 UTC+2 fredag 9. mai 2014 skrev David Romero Chamorro følgende:
>
> Hi all,
> I'm beginning to program with Julia so I don't know many..   
> I want to Implement a function roots , that when yo do: "ys=roots(p)", 
> returns 
> to ys the real roots of a the polynomial p.
> The function has to find the roots using the Sturm's theorem or the 
> Descartes' rules.
> Can anybody help me ?
>

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