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Re: [cgal-discuss] Strum Algorithm And Number of Distinct Roots


Chronological Thread 
  • From: "Sebastien Loriot (GeometryFactory)" <>
  • To:
  • Subject: Re: [cgal-discuss] Strum Algorithm And Number of Distinct Roots
  • Date: Wed, 11 Mar 2020 08:44:58 +0100
  • Authentication-results: mail2-smtp-roc.national.inria.fr; spf=None ; spf=Pass ; spf=None
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Is the root repeat a non degree 1 root?
Do you have an example showing the problem?

Best,

Sebastien.

On 3/5/20 1:08 PM, Ahmed Essam wrote:
Hi all,

I have been playing with CGAL's polynomial utilities and I have a question.
As far as I understand Strum's algorithm, it should calculate the exact number of distinct real roots. There is a polynomial however, where it overestimates the number of real roots, and when I calculate the roots, it repeated one of them, even though it wasn't a repeated root. Is this normal behavior?

Thanks,
Ahmed Essam



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