We present a counter example to a theorem given by Amir et al. [J. Math. Phys. 35, 3005–3012 (1994)]. We also comment on a misleading statement of the same reference.
REFERENCES
1.
M.
Jamil Amir
, A. H.
Bokhari
, and Asghar
Qadir
, J. Math. Phys.
35
, 3005
(1994
).2.
D. Kramer, H. Stephani, E. Hearlt, and M. A. H. MacCallum, Exact Solutions of Einstein Field Equations (Cambridge University, Cambridge, 1980).
3.
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© 1996 American Institute of Physics.
1996
American Institute of Physics