Kocayiǧit H.Önder M.Hacisalihoǧlu H.H.2025-04-102025-04-102014http://hdl.handle.net/20.500.14701/49875In this paper, we give definitions and characterizations of harmonic 1-type and weak biharmonic curves by using the mean curvature vector field of a Frenet curve in the Lorentzian 3-space L3. We also study weak biharmonic curves whose mean curvature vector fields are in the kernel of normal Laplacian ∇⊥. We give some theorems for them in L3. Moreover, we give some characterizations and results for a Frenet curve in the same space.Article10.2478/aicu-2013-0018