Finite-difference discretization Approximation equations 2 Finite difference method 2 Finite-difference solution 2 Iterative methods 2 Numerical experiments 2 Numerical methods 2 Alternating group explicit 1 Auxiliary functions 1 Boundary value problems 1 Derivative operators 1 Differentiation (calculus) 1 Discretization process 1 Finite difference approximations 1 Finite differences 1 High-order 1 High-order methods 1 Higher-order 1 Higher-order methods 1 Linear systems 1 Nonlinear equations 1 Number of iterations 1 Numerical differentiation 1 Parabolic Equations 1 Partial differential equations 1 Quadrilateral elements 1 Quadrilateral meshes 1 Successive over relaxation 1 Two point boundary value problems 1 Unstructured meshes 1