Optimal packing of circles in planar regions Sheung-Hung Poon Department of Computer Science HKUST November 14, 2003 11-11:50 AM Room 3501, HKUST Abstract -------- It is well-known that the densest packing of circles in the plane is the hexagonal lattice of the bee's honeycomb. However, not much is known about the densest packings of circles in planar regions such as equilateral triangels, squares, or circles. In this talk we survey the current state of art, present some conjectures, and consider other variants of the problem