Improved polynomial matrix determinant computation
Didier Henrion, Michael L Sebek · IEEE Transactions on Circuits and Systems I Fundamental Theory and Applications · 1999
An early result on the Smith-MacMillan form of a rational matrix is used for evaluating the degree of the determinant of a polynomial matrix using numerically reliable techniques. This allows for accurate determinant zeroing and determinant interpolation, thus improving existing numerical methods for polynomial matrix determinant computation.