Example: $x^2+y^2=z^2(1+xy)$ prove $z=\min \{x;y;z\}$ (with $x,y,z \in \mathbb{Z^+}$)

A "possible duplicate" warning prior to actual closing as duplicate seems to be a new feature.

If the question is closed you may simply see "closed as duplicate" at the same link. I am talking about an unattributed notice prior to closure, currently there are 4 votes to close and the question is open.