Classification of seven-point four-distance sets in the plane
Wenhua Lan, Xianglin Wei · Mathematical Notes · 2013
A point set X in the plane is called a k -distance set if there are exactly k different distances between two distinct points in X . In this paper, we classify 7-point 4-distance sets and show that there are forty two 7-point 4-distance sets in the plane up to isomorphism, we also give some results about diameter graphs.