d=detr(h) returns the determinant d of the double
or polynomial or rational function matrix h.
Based on Leverrier's algorithm.
Examples
// Matrix of doublesA=rand(5,5);detr(A)A=A+%i;detr(A)// Matrix of polynomialsx=poly(0,'x')A=[1+x25;34-x3+x;x^21x];detr(A)// Matrix of rationalsA=[1/x23;34/x3/x;1/x^211/x];detr(A)