Volume 33 • Number 2 • 2010   • Biharmonic Curves in Lorentzian Para-Sasakian Manifolds Sadik Keles, Selcen Yüksel Perktas, Erol Kiliç Abstract. In this paper we give necessary and sufficient conditions for spacelike and timelike curves in a conformally at, quasi conformally at and conformally symmetric 4-dimensional Lorentzian Para-Sasakian (LP-Sasakian) manifold to be proper biharmonic. Also, we investigate proper biharmonic curves in the Lorentzian sphere . 2000 Mathematics Subject Classification: 58C40, 53C42, 53C25. Full text: PDF