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madmike159
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Homework Statement
Prove that:
[tex]\nabla[/tex]X([tex]\nabla[/tex]Xa) = [tex]\nabla[/tex]([tex]\nabla[/tex][tex]\cdot[/tex]a) - [tex]\nabla^{2}[/tex]a
where a is a vector point function.
(X is the cross product and that dot is a dot product.)
Homework Equations
curl, grad, div
The Attempt at a Solution
I have just done another question of the form curl curl A = grad div A - [tex]\nabla[/tex]^2A
I'm stuck on this one as I don't know what a vector point function is. I tried it with a unit vector, but that just gave me 0 = 0.