residu residue [V]=residu(P,Q1,Q2) P, Q1, Q2 polynomials or matrix polynomials with real or complex coefficients. V=residu(P,Q1,Q2) returns the matrix V such that V(i,j) is the sum of the residues of the rational fraction P(i,j)/(Q1(i,j)*Q2(i,j)) calculated at the zeros of Q1(i,j). Q1(i,j) and Q2(i,j) must not have any common root. pfss bdiag roots poly gtild