Suppose I have a complex quadratic form
$Q(p_x,p_y)=p_y^2 y^2 \alpha^2 - 2 p_x p_y x y \alpha\beta + p_x^2 x^2 \beta^2 - p_y^2 y^2 \alpha -p_x^2 x^2 \beta$
Of course all parameters has been declared as variables, that is
var('p_x p_y x y \alpha \beta')
(I use unicode $\alpha$ and $\beta$)
Is there a way to find the matrix $\boldsymbol{A}$ such that
$Q(\boldsymbol{p})= \boldsymbol{p}^\top \boldsymbol{A}\boldsymbol{p}$ ?
