38     int half = n/2;  in model()  local
39     VectorBlock<const VectorType> u(uv, 0, half);  in model()
40     VectorBlock<const VectorType> v(uv, half, half);  in model()
44       for (int i = 0; i < half; i++)   in model()
65     int half = n/2;  in operator ()()  local
66     VectorBlock<const VectorType> u(uv, 0, half);  in operator ()()
67     VectorBlock<const VectorType> v(uv, half, half);  in operator ()()
72       for (int i = 0; i < half; i++)  in operator ()()
90     int half = n/2;  in df()  local
91     VectorBlock<const VectorType> u(uv, 0, half);  in df()
92     VectorBlock<const VectorType> v(uv, half, half);  in df()
96     for (int col = 0; col < half; col++)  in df()
109     for (int col = 0; col < half; col++)  in df()
117           fjac.coeffRef(row,col+half) = -4 * (u(col)/v(col))*coeff*(1-coeff);  in df()