collineation

n.

直射（变换），同射变换；共线；

Finite collineation groups :
On the orbits of collineation groups
On collineation groups of symmetric block designs ☆
Planes of ordern with collineation groups of ordern2
Finding the Collineation between Two Projective Reconstructions
On the Clifford collineation, transform and similarity groups. I.
On projective and affine planes with transitive collineation groups
A representation of the Mathieu group M 24 as a collineation group
2-Transitive and antiflag transitive collineation groups of finite projective spaces
Determination of the ternary collineation groups whose coefficients lie in the ${rm GF}(2sp n)$.