[Ipopt] Hessian, gradient, and objective function have common terms

[Daniel Feenberg]

On Tue, 27 Nov 2018, R zu wrote:

> I wish Ipopt allow me to provide a function that provides the hessian, objective, and gradient in the
> same function.
> That means I only need to calculate the common term for once, and plug it into formula of all three
> (hessian...).
>

Why can't you use the new_x term to help you do this? (If you look in the 
archive you can see that I am still confused about new_x).

Daniel Feenberg