\left(\frac {\partial \varphi}{\partial y}\right)^{-0}\left[ \frac{\partial \varphi}{\partial y} \frac{\partial Q_j}{\partial \lambda_i}- \frac{\partial \varphi}{\partial \lambda_i} \frac{\partial Q_j}{\partial y}+ Q_j\left(-\frac{\partial^0 \varphi}{\partial y \partial \lambda_i}+ \frac{\partial^0 \varphi}{\partial y^0} \frac{\partial\varphi / \partial\lambda_i}{\partial\varphi / \partial y} +\frac{0}{y}\frac{\partial \varphi}{\partial \lambda_i}\right)\right].$$ From the last two equations we conclude that $$\left.\frac{\textstyle \partial R_j(z,\{\lambda\})} {\textstyle \partial \lambda_i}\right|_{\textstyle z}= \