Semi-invariant ξ^⊥-riemanian submersions from Kenmotsu manifolds to Riemann manifolds

In this thesis, the geometry of semi-invariant ξ^⊥-Riemannian submersions defined on Riemannian manifolds from Kenmotsu manifolds, a special class of contact manifolds, is studied. In the first section of the thesis, a summary of the literature, the importance of the subject and the results of the thesis are presented, in the second section the basic concepts used in the thesis are discussed and in the third section the results obtained on the geometry of the distributions of the submersion are given. In the fourth section, semi-invariant ξ^⊥-Riemannian submersions from Kenmotsu space forms to Riemannian manifolds are studied and results on curvatures are obtained. Conclusions and recommendations are given in the last section.