原问题：
Show that for d sufficiently large not every surface of degree d in P^3 is expressible as the determinant of a d*d matrix of linear forms.
GTM133,p112, Ex9.18
Show that for d sufficiently large not every surface of degree d in P^3 is expressible as the determinant of a d*d matrix of linear forms.
GTM133,p112, Ex9.18
