How to express this formula by CVX

Hello, everyone !
V2 and V3 are both variables, how to write the expression by CVX ?

Make use of square_pos and pow_p provided by CVX, you will work it out.

Is it express in this way ?

square_pos( pow_p(V2(n),-alpha/2)+ pow_p(V3(n),-1) )

Yes.

But for this to be accepted by CVX, alpha must be nonnegative.

In this formulation, CVX (pow_p and inv_pos) will implicitly constrain V2(n) and V3(n) to be nonnegative.

OK, Thank you very much !