∇ ·(f A)=f(∇ ·A)+A·(∇ f)
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Created by Mathematica (August 6, 2004)
![Div[f] gives the divergence of the vector-valued function f in the default coordinate system. Div[f, coordsys] gives the divergence of f in the coordinate system coordsys. More…](../HTMLFiles/listas_317.gif){kind=small}
![Grad[f] gives the gradient of the scalar function f in the default coordinate system. Grad[f, coordsys] gives the gradient of f in the coordinate system coordsys. More…](../HTMLFiles/listas_319.gif){kind=small}
![Div[f a] - f Div[a] - a . Grad[f]//Simplify](../HTMLFiles/listas_320.gif){kind=small}
