Sobolev trace embedding Boundary conditions 6 Eigenvalues and eigenfunctions 6 Nonlinear boundary conditions 6 Problem solving 6 Steklov eigenvalues 6 Bessel functions 4 Boundary value problems 4 Critical exponents 4 Mathematical models 4 Optimal design 4 Optimal design problems 4 Theorem proving 4 homogenization 4 nonlinear boundary conditions 4 1-Laplacian 2 Calculus of variations 2 Convergence of numerical methods 2 Critical exponent 2 Domain decomposition methods 2 Functions of bounded variations 2 Homogenization 2 Homogenization problems 2 Optimal systems 2 Optimization 2 Perturbation techniques 2 Shape analysis 2 Shape derivative 2 Shape optimization 2 Sobolev 2