Hussain, I.; Mahomed, F.M.; Qadir, A.
(Symmetry, Integrability and Geometry: Methods and Applications, 2007)
Following the use of approximate symmetries for the Schwarzschild spacetime by A.H. Kara, F.M. Mahomed and A. Qadir (Nonlinear Dynam., to appear), we have investigated the exact and approximate symmetries of the system of ...