When is \begin{equation} \min_X \max_Y f(X,Y) \end{equation}
globally solvable? (i.e. we can find global solution for the optimization problem?) I am not looking for reformulations. Is it only when $f$ is concave in $Y$ and convex in $X$?
When is \begin{equation} \min_X \max_Y f(X,Y) \end{equation}
globally solvable? (i.e. we can find global solution for the optimization problem?) I am not looking for reformulations. Is it only when $f$ is concave in $Y$ and convex in $X$?