  The present paper deals with the study of invariant submanifolds of
generalized Sasakian-space-forms with respect to Levi-Civita connection as well
as semi-symmetric metric connection. We provide some examples of such
submanifolds and obtain many new results including, the necessary and
sufficient conditions under which the submanifolds are totally geodesic. The
Ricci solitons of such submanifolds are also studied.
