От: | KosTiger | ||
Дата: | 02.11.06 06:33 | ||
Оценка: |
\begin{matrix} \operatorname{div}: & C^{\infty}(\R^3,\R^3) & \rightarrow & C^{\infty}(\R^3) \\ & \vec F=\left(F^1,F^2,F^3\right) & \mapsto & \frac{\partial}{\partial x_1}F^1 + \frac{\partial}{\partial x_2}F^2+ \frac{\partial}{\partial x_3}F^3 \end{matrix}