projective plane

Noun

 * 1)  A  in which any pair of  points determine a  and any pair of distinct lines intersect at a point.
 * Generally, a projective plane of "order" N has $$N^2 + N + 1$$ points, and the same number of lines.
 * Generally, a projective plane of "order" N has $$N^2 + N + 1$$ points, and the same number of lines.