#include <boost/qvm/mat_operations.hpp>
namespace boost { namespace qvm { template <class T,int D> -unspecified-return-type- zero_mat(); template <class T,int R,int C> -unspecified-return-type- zero_mat(); } }
A read-only matrix of unspecified type with scalar_type T, R rows and C columns (or D rows and D columns), with all elements equal to scalar_traits<T>::value(0).