Proper Projective Symmetry in some well known Conformally flat Space-Times
arXiv:gr-qc/0512086
Abstract
A study of conformally flat but non flat Bianchi type I and cylindrically symmetric static space-times according to proper projective symmetry is given by using some algebraic and direct integration techniques. It is shown that the special class of the above space-times admit proper projective vector fields.
12 pages