A Collineation which transforms every 1-D form projectively. Any Collineation which transforms one range into a projectively related range is a projective collineation. Every Perspective Collineation is a projective collineation.

**References**

Coxeter, H. S. M. *Introduction to Geometry, 2nd ed.* New York: Wiley, pp. 247-248, 1969.

© 1996-9

1999-05-26