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I Finding multiple roots of polynomial using numerical methods

  1. Nov 22, 2017 #21


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    I like Matlab's version too. It uses the fact that the eigenvalues of the companion matrix (https://en.wikipedia.org/wiki/Companion_matrix) are the roots of the polynomial. So if NotASmurf already has code to find eigenvalues then they are set - the eigenvalue calculator does all of the heavy lifting.


    EDIT: Oops - I failed to look and see that this is a very, very stale thread!
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