The class Extended_homogeneous<RT> serves as a traits class for the class CGAL::Nef_polyhedron_2<T>. It uses a polynomial component representation based on a Euclidean ring number type RT.
To make an Euclidean ring number type RT_model work with this class the number type must support a gcd computation in namespace CGAL::NTS. CGAL provides a function template for this, which will be used by default when your number type is not one of the built-in number types, one of the number types distrubuted with CGAL or one of the LEDA number types.
Fits all operation requirements of the concept.