Formula_13819

\[g_{i j}^{p}\left[x_{p}\left(x_{q}\right)\right] \frac{\partial x_{p}^{i}}{\partial x_{q}^{k}} \frac{\partial x_{p}^{j}}{\partial x_{q}^{l}}=g_{k l}^{q}\left(x_{q}\right) .\]