l2                 43 src/io_l2h1Calculator.cpp   L2_norm l2;
l2                 73 src/io_l2h1Calculator.cpp :l2 {gt.grid_part()}, h1{gt.grid_part()} {
l2                109 src/io_l2h1Calculator.cpp   return d_ptr->l2.distance(u1, u2);
l2                118 src/io_l2h1Calculator.cpp       l2.distance(d_ptr->vec_fefun1[it], d_ptr->vec_fefun2[it]);