polymod SciMax Toolbox polynomialp

SciMax Toolbox >> polynome2ele

polynome2ele

Maxima Function

Calling Sequence

polynome2ele (P, x)

Description

gives the list l = [n, e_1, ..., e_n] where n is the degree of the polynomial P in the variable x and e_i is the i-the elementary symmetric function of the roots of P.

(%i1) polynome2ele (x^7 - 14*x^5 + 56*x^3 - 56*x + 22, x);
(%o1)          [7, 0, - 14, 0, 56, 0, - 56, - 22]
(%i2) ele2polynome ([7, 0, -14, 0, 56, 0, -56, -22], x);
                  7       5       3
(%o2)            x  - 14 x  + 56 x  - 56 x + 22

The inverse: ele2polynome (l, x)

polymod SciMax Toolbox polynomialp