Minimization problems involving nonlocal functionals: nonlocal minimal surfaces and a free boundary problem
arXiv:1811.09746
Abstract
This doctoral thesis is devoted to the analysis of some minimization problems that involve nonlocal functionals. We are mainly concerned with the -fractional perimeter and its minimizers, the -minimal sets. We investigate the behavior of sets having (locally) finite fractional perimeter and we establish existence and compactness results for (locally) -minimal sets. We study the -minimal sets in highly nonlocal regimes, that correspond to small values of the fractional parameter . We introduce a functional framework for studying those -minimal sets that can be globally written as subgraphs. In particular, we prove existence and uniqueness results for minimizers of a fractional version of the classical area functional and we show the equivalence between minimizers and various notions of solution of the fractional mean curvature equation. We also prove a flatness result for entire nonlocal minimal graphs having some partial derivatives bounded from either above or below. Moreover, we consider a free boundary problem, which consists in the minimization of a functional defined as the sum of a nonlocal energy, plus the classical perimeter. Concerning this problem, we prove uniform energy estimates and we study the blow-up sequence of a minimizer---in particular establishing a Weiss-type monotonicity formula.
arXiv commentdoctoral thesis
References in corpus (6)
- Interaction Ruling Animal Collective Behaviour Depends on Topological rather than Metric Distance: Evidence from a Field Study
- Nonlocal diffusion and applications
- Gamma-convergence of nonlocal perimeter functionals
- Modeling self-organization in pedestrians and animal groups from macroscopic and microscopic viewpoints
- Complete stickiness of nonlocal minimal surfaces for small values of the fractional parameter
- Planelike interfaces in long-range Ising models and connections with nonlocal minimal surfaces