determ determinant of polynomial matrix res=determ(W [,k]) W real square polynomial matrix k integer (upper bound for the degree of the determinant of W) returns the determinant of a real polynomial matrix (computation made by FFT if W size is greater than 2*2). res=determ(W [,k])k is an integer larger than the actual degree of the determinant of W. The default value of k is the smallest power of 2 which is larger than n*max(degree(W)). Method (Only if W size is greater than 2*2) : evaluate the determinant of W for the Fourier frequencies and apply inverse FFT to the coefficients of the determinant. det detr coffg