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We discuss some recent developments in the theory of free boundary problems, as obtained in a series of papers in collaboration with L. Caffarelli, A. Karakhanyan and O. Savin. The main feature of these new free boundary problems is that…

Analysis of PDEs · Mathematics 2017-05-02 Serena Dipierro , Enrico Valdinoci

The aim of this paper is to study a class of nonlocal fractional Laplacian equations depending on two real parameters. More precisely, by using an appropriate analytical context on fractional Sobolev spaces due to Servadei and Valdinoci, we…

Analysis of PDEs · Mathematics 2016-08-29 Giovanni Molica Bisci , Dušan Repovš

We study the quasistatic evolution of a linear peridynamic Kelvin-Voigt viscoelastic material. More specifically, we consider the gradient flow of a nonlocal elastic energy with respect to a nonlocal viscous dissipation. Following an…

Analysis of PDEs · Mathematics 2024-02-27 Manuel Friedrich , Manuel Seitz , Ulisse Stefanelli

In the class of the so called non-dynamic Fractional Obstacle Problems of parabolic type, it is shown how to obtain higher regularity as well as optimal regularity of the space derivatives of the solution. Furthermore, at free boundary…

Analysis of PDEs · Mathematics 2016-12-30 Ioannis Athanasopoulos , Luis Caffarelli , Emmanouil Milakis

Motivated by recent experiments on nonlocal transport through multiterminal superconducting hybrid structures, we present self-consistent calculations based on quasiclassical Green's functions for the order parameter, currents and voltages…

Superconductivity · Physics 2015-05-13 F. S. Bergeret , A. Levy Yeyati

We consider a one-phase free boundary problem governed by doubly degenerate fully non-linear elliptic PDEs with non-zero right hand side, which should be understood as an analog (non-variational) of certain double phase functionals in the…

Analysis of PDEs · Mathematics 2021-10-04 João Vítor da Silva , Giane C. Rampasso , Gleydson C. Ricarte , Hernán A. Vivas

Backward stochastic partial differential equations of parabolic type in bounded domains are studied in the setting where the coercivity condition is not necessary satisfied and the equation can be degenerate. Some generalized solutions…

Probability · Mathematics 2014-05-26 Nikolai Dokuchaev

We develop a theory of existence of minimizers of energy functionals in vectorial problems based on a nonlocal gradient under Dirichlet boundary conditions. The model shares many features with the peridynamics model and is also applicable…

Analysis of PDEs · Mathematics 2022-11-07 José C. Bellido , Javier Cueto , Carlos Mora-Corral

Hyperbolic partial differential equations on a one-dimensional spatial domain are studied. This class of systems includes models of beams and waves as well as the transport equation and networks of non-homogeneous transmission lines. The…

Analysis of PDEs · Mathematics 2014-09-24 Birgit Jacob , Kirsten Morris , Hans Zwart

An $\mathrm{L}_1$-maximal regularity theory for parabolic evolution equations inspired by the pioneering work of Da Prato and Grisvard is developed. Besides of its own interest, the approach yields a framework allowing global-in-time…

Analysis of PDEs · Mathematics 2021-11-30 Raphaël Danchin , Matthias Hieber , Piotr B. Mucha , Patrick Tolksdorf

We discuss the optimal regularity and nondegeneracy of a free boundary problem related to the fractional Laplacian. This work is related to, but addresses a different problem from, recent work of Caffarelli, Roquejoffre, and Sire. A variant…

Analysis of PDEs · Mathematics 2013-02-08 Ray Yang

We consider a wide class of fully nonlinear integro-differential equations that degenerate when the gradient of the solution vanishes. By using compactness and perturbation arguments, we give a complete characterization of the regularity of…

Analysis of PDEs · Mathematics 2024-08-29 Yuzhou Fang , Vicentiu D. Radulescu , Chao Zhang

In this paper we are interested in integro-differential elliptic and parabolic equations involving nonlocal operators with order less than one, and a gradient term whose coercivity growth makes it the leading term in the equation. We obtain…

Analysis of PDEs · Mathematics 2015-05-13 Guy Barles , Erwin Topp

We study the quasilinear Maxwell system with a strictly positive, state dependent boundary conductivity. For small data we show that the solution exists for all times and decays exponentially to $0$. As in related literature we assume a…

Analysis of PDEs · Mathematics 2026-01-15 Richard Nutt , Roland Schnaubelt

The non-local degenerate Cahn-Hilliard equation is derived from the Vlasov equation with long-range attraction. We study the local limit as the delocalization parameter converges to 0. The difficulty arises from the degeneracy which…

Analysis of PDEs · Mathematics 2023-06-13 Charles Elbar , Benoît Perthame , Jakub Skrzeczkowski

We consider nonlocal equations of order larger than one with measure data and prove gradient regularity in Sobolev and H\"older spaces as well as pointwise bounds of the gradient in terms of Riesz potentials, leading to fine regularity…

Analysis of PDEs · Mathematics 2024-10-29 Tuomo Kuusi , Simon Nowak , Yannick Sire

We introduce and analyze the nonlocal variants of two Cahn-Hilliard type equations with reaction terms. The first one is the so-called Cahn-Hilliard-Oono equation which models, for instance, pattern formation in diblock-copolymers as well…

Analysis of PDEs · Mathematics 2015-05-14 Francesco Della Porta , Maurizio Grasselli

We consider a quasilinear nonhomogeneous, anisotropic Maxwell system in a bounded smooth domain of $\mathbb{R}^{3}$ with a strictly positive conductivity subject to the boundary conditions of a perfect conductor. Under appropriate…

Analysis of PDEs · Mathematics 2018-10-31 Irena Lasiecka , Michael Pokojovy , Roland Schnaubelt

The nonlocal models of peridynamics have successfully predicted fractures and deformations for a variety of materials. In contrast to local mechanics, peridynamic boundary conditions must be defined on a finite volume region outside the…

Analysis of PDEs · Mathematics 2021-06-29 Mikil Foss , Petronela Radu , Yue Yu

This is a study of a class of nonlocal nonlinear diffusion equations. We present a strong maximum principle for nonlocal time-dependent Dirichlet problems. Results are for bounded functions of space, rather than (semi)-continuous functions.…

Analysis of PDEs · Mathematics 2016-02-12 Ravi Shankar , Tucker Hartland