On (q2 + q + 1)-sets of class [1, m, n]2 in PG(3, q)

• Published in: Journal of geometry Vol. 105; no. 3; pp. 449 - 455
• Main Author: Napolitano, Vito
• Format: Journal Article
• Language: English
• Published: Basel Springer Basel 01.12.2014
• Subjects: Geometry; Mathematics; Mathematics and Statistics; quadric cone; 51E26; Projective space; intersection number

A characterization of cones in P G (3, q ) as sets of points of P G (3, q ) of size q 2 + q + 1 projecting from a point V a set of q + 1 points of a plane of P G (3, q ) and with three intersection numbers with respect to the planes is given.