Originally Posted by

**Silverflow** Hi all,

I have question that goes as follows:

If $\displaystyle f(\underline{r})$ is a scalar field, use stokes theorem to deduce that

$\displaystyle \int\int_{S} grad f \wedge d\underline{S} = -\oint_{C}fd\underline{r}$

Where C is a space curve bounding a closed space S.

When I look at the equations, I can see that $\displaystyle -\oint_{C}fd\underline{r} = -\int\int_{S} curl \underline{f} * d\underline{S} $, as by Stoke's theorem. However, I don't think that helps just yet. Apart from that, I'm not sure how to approach this question.

Any points in the right direction is greatly appreciated. Thanks in advance!