[4,3]-Configurations with Many Symmetries

摘要

A family of points and lines in the Euclidean or projective plane is called a [q,k] -configuration provided each of the points is incident with precisely q of the lines,and each line with precisely k of the points. If there are p points and n lines, we say that it is a (pq,nk) configuration. If q = k then obviously p = n, and we talk about a k-configuration or an (nk) configuration.