I'm trying to do some practice for an electromagnetism course, and am trying to calculate the grad, curl and div of a vector $A = (2xy, 3zx, yx^2)$
Div = $\nabla . A$
Curl = $\nabla \times A$
Grad = $\nabla A$
I have worked out the first two, but I seem to be having a mind blank and I'm getting myself all confused with the Grad component if someone could clarify this?
Also if someone could explain when I might need to use the Laplace Operator? What is it used for?