G. Helmberg et al., ON FADDEEV-LEVERRIER METHOD FOR THE COMPUTATION OF THE CHARACTERISTICPOLYNOMIAL OF A MATRIX AND OF EIGENVECTORS, Linear algebra and its applications, 185, 1993, pp. 219-233
Faddeev's method of computing the eigenvalues and eigenvectors of a ma
trix is presented and completed so as also to cover the case of multip
le zeros of the characteristic equation.