On Mon, 9 Oct 2023 15:05:28 -1000, Charles White <whitece6@hawaii.edu> said:
CW> Hi GiNaC! Is there a built-in method to find all zeros of a CW> polynomial? I'm trying to find symbolic zeros if possible and CW> numeric zeros for all other cases. If I remember correctly, analytic expression for polynomial roots is possible only up to the four order (inclusively). These formulae can be directly coded by a user. For a generic polynomial with integer coefficient factor() method may give hint on possible integer roots. Numerical approximation may be obtained by fsolve(), see section "2.2 What it can do for you" of the tutorial. -- Vladimir V. Kisil http://www1.maths.leeds.ac.uk/~kisilv/ Book: Geometry of Mobius Maps https://doi.org/10.1142/p835 Soft: Geometry of cycles http://moebinv.sourceforge.net/ Jupyter notebooks: https://github.com/vvkisil?tab=repositories