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→Переход из одной системы координат в другую
<tex> J =
\begin{vmatrix} \dfrac{\partial x_1}{\partial \xi_1} & \dfrac{\partial x_2}{\partial \xi_1} & \cdots & \dfrac{\partial x_n}{\partial \xi_1}
\\ \dfrac{\partial x_1}{\partial \xi_2} & \dfrac{\partial x_2}{\partial \xi_2} & \cdots &\dfrac{\partial x_1x_n}{\partial \xi_2}
\\ \vdots & \vdots & \ddots & \vdots
\\ \dfrac{\partial x_1}{\partial \xi_n} & \dfrac{\partial x_2}{\partial \xi_n} & \cdots &\dfrac{\partial x_1x_n}{\partial \xi_n}
\end{vmatrix}
</tex>,
