Re: [GiNaC-list] Polynomial companion matrix

Hi James, James Jackson schrieb:

As far as I can see, there is no method available to compute the companion matrix of a polynomial. May I suggest the addition of a method along these lines?:

sure, we can include such a function. I am just a bit confused about the conventions here:

mat(i, j) = -1 * poly.coeff(symbol, rank - j - 1) / majorCoeff;

Shouldn't coefficient c_j go in row j? Regards, Jens