  The existence of equilibrium points and the effect of radiation pressure have
been discussed numerically. The problem is generalized by considering bigger
primary as a source of radiation and small primary as an oblate spheroid. We
have also discussed the Poynting-Robertson(P-R) effect which is caused due to
radiation pressure. It is found that the collinear points $L_1,L_2,L_3$ deviate
from the axis joining the two primaries, while the triangular points $L_4,L_5$
are not symmetrical due to radiation pressure. We have seen that $L_1,L_2,L_3$
are linearly unstable while $L_4,L_5$ are conditionally stable in the sense of
Lyapunov when P-R effect is not considered. We have found that the effect of
radiation pressure reduces the linear stability zones while P-R effect induces
an instability in the sense of Lyapunov.
