Discretization of Laplacian Operator on 19 Points Stencil Using Cylindrical Mesh System with the Help of Explicit Finite Difference Scheme. PJETS [Internet]. 2023 Dec. 15 [cited 2026 Apr. 4];11(2):1-10. Available from: https://journals.iobm.edu.pk/index.php/pjets/article/view/1019