Improved accuracy in calculating the characteristic polynomial
P.P.J. van den Bosch, L.A.M. Kuijk · Electronics Letters · 1981
In calculating the coefficients of the characteristic polynomial of a square matrix A, the algorithm due to Leverrier is often used. However, due to numerical errors, this algorithm is not reliable when the dimension of A increases. A modification of this algorithm which increases the accuracy of the algorithm considerably will be proposed.