Neumann boundary conditions Nonlocal diffusion 24 Dirichlet boundary conditions 4 Fractional Laplacian 4 Mass transport 4 P-Laplacian 4 Quasilinear elliptic equations 4 Topological index 4 Total variation flow 4 Two-ion electro-diffusion 4 Unequal valencies 4 p-Laplacian 4 35K05 2 45A05 2 45J05 2 Asymptotic behaviour 2 Boundary conditions 2 Heat equation 2 Laplace transforms 2 Neumann boundary condition 2 Numerical approximations 2 Partial differential equations 2 Sandpiles 2 Total variation ow 2