localNorm2(const ILattice<T,N>& s1)
localNorm2(const IScalar<T>& s1)
localNorm2(const ILattice<T,N>& s1){  typename UnaryReturn<ILattice<T,N>, FnLocalNorm2>::Type_t  d;  d.elem() = localNorm2(s1.elem(0));  for(int i=1; i < N; ++i)    d.elem() += localNorm2(s1.elem(i));  return d;}