Şan, SaitYaşar, Emrullah2024-08-022024-08-022015-05-011007-5704https://doi.org/10.1016/j.cnsns.2014.08.031https://www.sciencedirect.com/science/article/pii/S1007570414004328https://hdl.handle.net/11452/43637In this study, the nonlocal conservation theorem and multiplier approach are performed on the 1 + 1 dimensional Derrida-Lebowitz-Speer-Spohn (DLSS) equation which arises in quantum semi conductor theory. We obtain local conservation laws by using the both methods. Furthermore by utilizing the relationship between conservation laws and Lie point symmetries, the DLSS equation is reduced to third order ordinary differential equation.eninfo:eu-repo/semantics/closedAccessPartial-differential-equationsSymmetriesConservation lawsSymmetry generatorsScience & technologyPhysical sciencesTechnologyMathematics, appliedMathematics, interdisciplinary applicationsMechanicsPhysics, fluids & plasmasPhysics, mathematicalMathematicsMechanicsPhysicsArticle00034570050009812971304221-310.1016/j.cnsns.2014.08.0311878-7274