Nonlinear boundary conditions 25 Nonlocal diffusion 23 Boundary conditions 15 p-Laplacian 13 P-Laplacian 12 Eigenvalues and eigenfunctions 8 Laplace transforms 8 Neumann boundary conditions 8 Problem solving 8 Blow-up 7 Infinity Laplacian 7 Asymptotic behaviour 6 Eigenvalues 6 Mass transport 6 Numerical approximations 6 Viscosity solutions 6 Dirichlet boundary conditions 5 Dirichlet problem 5 Eigenvalue problems 5 Elliptic equations 5 Sobolev trace embedding 5 Variational problems 5 Asymptotic behavior 4 Diffusion 4 Elliptic systems 4 Monge-Kantorovich problems 4 Neumann problem 4 P-Laplacian equation 4 Tug-of-war games 4 Viscosity 4