// mul poly1 with scalar2
vect_tmp = c.multVect(this.b2[x2], vect_tmp);
this.pub_singular[crnt_row + p] = c.addVect(vect_tmp,
this.pub_singular[crnt_row + p]);
// mul scalar1 with poly2
vect_tmp = c.multVect(coeff_alpha[p][x1][x2],
this.A2[x2]);
vect_tmp = c.multVect(b2[x1 + vins], vect_tmp);
this.pub_singular[crnt_row + p] = c.addVect(vect_tmp,
this.pub_singular[crnt_row + p]);
// mul scalar1 with scalar2