Leanos, J; Lomeli, M; Merino, C; Salazar, G; Urrutia, J
(2007)
It is shown that if a simple Euclidean arrangement of n pseudolines has no (>= 5)-gons, then it has exactly n - 2 triangles and (n - 2)(n - 3)/2 quadrilaterals. We also describe how to construct all such arrangements, and ...