Approximate solution Diffusion 2 Laplace transforms 2 New approaches 2 Numerical methods 2 Partial differential equations 2 Advection 1 Advection-diffusion equation 1 Approximation methods 1 Backward differentiation formulae 1 Biology 1 Boundary conditions 1 Computation theory 1 Computing solutions 1 Convolution 1 Convolution theorems 1 Delay differential equations 1 Differential equations 1 Discontinous Galerkin methods 1 Discontinuous Galerkin 1 Discontinuous galerkin 1 Equation models 1 Exact solution 1 Explicit finite difference method 1 Finite difference method 1 Finite element method 1 Fractional order 1 Fractional order pseudo-parabolic differential equation 1 Galerkin methods 1 Groundwater 1