I would like to prove

with Gauss's theorem. According to Gauss's theorem, we know

Now if I want to prove it, I should write

Is this correct? How is that possible?

Printable View

- Apr 1st 2011, 10:43 AMrado5Gauss's theorem, gradient
I would like to prove

with Gauss's theorem. According to Gauss's theorem, we know

Now if I want to prove it, I should write

Is this correct? How is that possible?