non-convex minimization in Hilbert space, Derivatives of functions in infinite-dimensional spaces, Methods involving semicontinuity and convergence; relaxation, evolution equations, (p,q)-convex functions, problems with non-convex constraints, Semigroups of nonlinear operators, (p,q)-monotone operators, points which are critical from below, Lipschitz continuous perturbations of monotone operators, perturbations of convex functions, Existence theories for problems in abstract spaces, Monotone and positive operators on ordered Banach spaces or other ordered topological vector spaces, subdifferentials