On bi-slant submanifolds of para-hermi̇ti̇an manifolds

In the present thesis, the notions of slant, bi-slant and semi-slant submanifolds Hermitian and para- Hermitian manifolds are examined. This thesis consists of seven chapters. In the first section, main studies on bi-slant submanifolds in the literature are mentioned. In the second section, basic definitions and theorems on the geometry of complex structures and submanifolds are presented. The geometric properties of bi-slant submanifolds of Hermitian manifolds are discussedthrough various examples. In the third chapter, the submanifold theory of para-Hermitian manifolds is discussed and the basic properties of bi-slant submanifolds are investigated. In the fourth chapter,the conditions for a bi-slant submanifold of a Para-Hermitian manifold to be slant are determined. The remaining chapters of this thesis include discussion, conclusions, and recommendations.