Shadab Ahmad Khan, Divesh Srivastava, Anis Ahmad, Toukeer Khan2026-09-162026978-3-032-14155-2https://doi.org/10.1007/978-3-032-14156-9_29http://136.232.12.194:4000/handle/123456789/2188Mathematics and Logics in Computer Science Proceedings of ICMLCS 2025 Editors: Atul Chaturvedi, Bimal Kumar Roy, Boaz TsabanIn this research paper, we analyze a non-invariant hypersurfaces of a quasi-para-Sasakian manifold with (f , g, u, v, λ)-structure. The paper is divided into two sections. In the first section the properties of non-invariant hypersurfaces of a quasi-para-Sasakian manifold with (f , g, u, v,λ)-structure are discussed. In second section, the necessary and sufficient condition for totally umbilical non- invariant hypersurfaces equipped with (f , g, u, v, λ)-structure of a quasi-para- Sasakian manifold to be totally geodesic has been explored.en-USQuasi-para-Sasakian manifoldNon-invariant hypersurfacesTotally geodesic and totally umbilicalBook chapter