58   Vector poly2(poly.size() + 1);  in AddRealRoot()  local
59   poly2.setZero();  in AddRealRoot()
60   poly2.head(poly.size()) += poly;  in AddRealRoot()
61   poly2.tail(poly.size()) -= root * poly;  in AddRealRoot()
62   return poly2;  in AddRealRoot()
68   Vector poly2(poly.size() + 2);  in AddComplexRootPair()  local
69   poly2.setZero();  in AddComplexRootPair()
71   poly2.head(poly.size()) += poly;  in AddComplexRootPair()
72   poly2.segment(1, poly.size()) -= 2 * real * poly;  in AddComplexRootPair()
73   poly2.tail(poly.size()) += (real*real + imag*imag) * poly;  in AddComplexRootPair()
74   return poly2;  in AddComplexRootPair()