Hi,
I'm trying to determine ##\vec{\bigtriangledown }\times \vec{a}## , where ##\vec{a}=\vec{\omega }\times \vec{r}##, being ##\vec{\omega }## a constant vector, and ##\vec{r}## the position vector, using this definition:
##\vec{curl}(\vec{a})=\lim_{V\rightarrow 0}\frac{1}{V}\oint...