#include <boost/qvm/v.hpp>
namespace boost
{
namespace qvm
{
//Only enabled if:
// is_v<A>::value && is_v<B>::value &&
// v_traits<A>::dim==v_traits<B>::dim
template <class A,class B>
typename deduce_v2<A,B,v_traits<A>::dim>::type
operator-( A const & a, B const & b );
}
}
A vector of the same size as a and b, with elements the elements of b subtracted from the corresponding elements of a.