I have variable x(n).

I would like to minimize `1*(x .* x)`

.

`minimize(sum(inv_pos(x)))`

works, `minimize(sum( pow_p(x, 2)))`

works.

But `minimize(sum( inv_pos(pow_p(x,2)))`

fails.

How can I optimize `1/(x*x)`

?

Doesnâ€™t `sum(pow_p(x,-2))`

work?