О геометрии QS-гиперповерхностей келеровых многообразий

Almost contact metric structures are induced on any oriented hypersurface of an almost Hermitian manifold. In this paper, we study the case when the almost Hermitian manifold is Kählerian and the almost contact structure on its hypersurface is quasi-Sasakian. Some theorems on geometry of quasi-Sasakian hypersurfaces of a Kählerian manifold are proved.