The Houses and Utilities Crossing Problem
Wolfram Demonstrations Project · 2008
The edges that connect each utility (green disks) to each house (blue squares) are in a single color. Each house in turn has a spectrum of colored edges that connect it to each utility. The red points are crossing points of utility lines. The object is to minimize the number of crossings for a particular set of utilities and houses by shifting their locations.The minimal known number of crossings