Further results on orbits and incidence matrices for the class ${\mathcal{O}}_6$ of lines external to the twisted cubic in $\mathrm{PG}(3,q)$

Alexander A. Davydov, Stefano Marcugini, Fernanda Pambianco

In the literature, lines of the projective space $\mathrm{PG}(3,q)$ are partitioned into classes, each of which is a union of line orbits under the stabilizer group of the twisted…