INTERNATIONAL ELECTRONIC JOURNAL OF GEOMETRY, cilt.14, sa.2, ss.313-330, 2021 (ESCI)
We define generalized semi-invariant submanifolds in locally product Riemannian manifolds. Then we study multiply warped product generalized semi-invariant submanifolds in the same structure. We give an existence theorem for such submanifolds. We also give necessary and sufficient conditions for such a submanifold to be a multiply direct product submanifold. Moreover, we establish a general inequality for such submanifolds.