## anonymous 4 years ago Vector differentiation stuff?

1. anonymous

Verify the identity (in cartesian coords) $\vec{\nabla} \times (\vec{\nabla} \times \vec{A}(\vec{r}))=\vec{\nabla}(\vec{\nabla} \cdot \vec{A}(\vec{r}))-\vec{\nabla}^2 \vec{A}(\vec{r})$

2. anonymous

I have an attempt but I just don't know how to get it to work right. I get an expression on the left with 12 terms and an expressin on the right of something else. Idk?

3. anonymous

I forgot this stuff but maybe this helps you http://www.youtube.com/watch?v=P4edqL1r4DQ