Find the max number of points of intersection of semicircles
Source: P7: BWM 2014
October 7, 2014
functioncombinatorics proposedcombinatorics
Problem Statement
A line is given in a plane. distinct points are chosen arbitrarily from and are named as . For each pair of points , a semicircle is drawn with and as its endpoints. All semicircles lie on the same side of . Determine the maximum number of points (which are not lying in ) of intersection of semicircles as a function of .