On the Twisted Cubic of PG(3, q)

G. Lunardon, O. Polverino
2003 Journal of Algebraic Combinatorics  
In this paper we classify the lines of PG(3, q) whose points belong to imaginary chords of the twisted cubic of PG(3, q). Relying on this classification result, we obtain a complete classification of semiclassical spreads of the generalized hexagon H (q).
doi:10.1023/b:jaco.0000011940.77655.b4 fatcat:kkjzhp4yl5ecfhi5f357o73bjq