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We use a characterization of the fractional Laplacian as a Dirichlet to Neumann operator for an appropriate differential equation to study its obstacle problem in perforated domains.

Analysis of PDEs · Mathematics 2007-11-15 L. A. Caffarelli , A. Mellet

This work is devoted to study the existence of infinitely many weak solutions to nonlocal equations involving a general integrodifferential operator of fractional type. These equations have a variational structure and we find a sequence of…

Analysis of PDEs · Mathematics 2013-12-16 Giovanni Molica Bisci

In this note we prove a new symmetrization result, in the form of mass concentration comparison, for solutions of nonlocal nonlinear Dirichlet problems involving fractional p Laplacians. Some regularity estimates of solutions will be…

Analysis of PDEs · Mathematics 2022-05-13 Vincenzo Ferone , Bruno Volzone

We discuss the existence theory of a nonlinear problem of nonlocal type subject to Neumann boundary conditions. Differently from the existing literature, the elliptic operator under consideration is obtained as a superposition of operators…

Analysis of PDEs · Mathematics 2026-03-12 Serena Dipierro , Edoardo Proietti Lippi , Caterina Sportelli , Enrico Valdinoci

We derive the existence of solutions for an asymptotically linear equation driven by the spectral fractional Laplacian operator with mixed Dirichlet-Neumann boundary conditions. When the nonlinear term $f$ is odd and a suitable relation…

Analysis of PDEs · Mathematics 2026-03-09 Giovanni Molica Bisci , Alejandro Ortega , Luca Vilasi

We establish critical and subcritical sharp Trudinger-Moser inequalities for fractional dimensions on the whole space. Moreover, we obtain asymptotic lower and upper bounds for the fractional subcritical Trudinger-Moser supremum from which…

Analysis of PDEs · Mathematics 2024-04-01 José Francisco de Oliveira , João Marcos do Ó

We study the existence and multiplicity of solutions for a class of fractional Schr\"{o}dinger-Kirchhoff type equations with the Trudinger-Moser nonlinearity. More precisely, we consider \begin{gather*} \begin{cases}…

Analysis of PDEs · Mathematics 2019-06-20 Mingqi Xiang , Binlin Zhang , Dušan Repovš

It is established existence, uniqueness and multiplicity of solutions for a quasilinear elliptic problem problems driven by $\Phi$-Laplacian operator. Here we consider the reflexive and nonreflexive cases using an auxiliary problem. In…

Analysis of PDEs · Mathematics 2017-09-19 M. L. M. Carvalho , J. V. Goncalves , Edcarlos D. da Silva , K. O. Silva

We consider the divergent fractional Laplace operator presented in [Dipierro-Savin-Valdinoci, Rev. Mat. Iberoam.] and we prove three types of results. Firstly, we show that any given function can be locally shadowed by a solution of a…

Analysis of PDEs · Mathematics 2021-02-04 Serena Dipierro , Ovidiu Savin , Enrico Valdinoci

We first formulate an inverse problem for a linear fractional Lam\'e system. We determine the Lam\'e parameters from exterior partial measurements of the Dirichlet-to-Neumann map. We further study an inverse obstacle problem as well as an…

Analysis of PDEs · Mathematics 2021-09-09 Li Li

In this paper, we first prove the existence of solutions to Dirichlet problems involving the fractional $g$-Laplacian operator and lower order terms by appealing to sub- and supersolution methods. Moreover, we also state the existence of…

Analysis of PDEs · Mathematics 2023-05-04 Pablo Ochoa , Analía Silva , Maria José Suarez Marziani

In this paper we investigate the existence of multiple solutions for the following two fractional problems \begin{equation*} \left\{\begin{array}{ll} (-\Delta_{\Omega})^{s} u-\lambda u= f(x, u) &\mbox{in} \Omega \\ u=0 &\mbox{in} \partial…

Analysis of PDEs · Mathematics 2018-09-06 Vincenzo Ambrosio

We study a Dirichlet problem driven by the degenerate fractional p-Laplacian and involving a nonlinear reaction, which depends on a positive parameter. The reaction is assumed to be (p-1)-sublinear near the origin and (p-1)-superlinear at…

Analysis of PDEs · Mathematics 2022-12-23 Silvia Frassu , Antonio Iannizzotto

We consider a Dirichlet type problem for a nonlinear, nonlocal equation driven by the degenerate fractional p-Laplacian, with a logistic type reaction depending on a positive parameter. In the subdiffusive and equidiffusive cases, we prove…

Analysis of PDEs · Mathematics 2021-01-15 Antonio Iannizzotto , Sunra Mosconi , Nikolaos S. Papageorgiou

The aim of this paper is to establish two results about multiplicity of solutions to problems involving the $1-$Laplacian operator, with nonlinearities with critical growth. To be more specific, we study the following problem $$ \left\{…

Analysis of PDEs · Mathematics 2021-07-02 Claudianor O. Alves , Anass Ourraoui , Marcos T. O. Pimenta

We prove the existence of extremals for fractional Moser-Trudinger inequalities in an interval and on the whole real line. In both cases we use blow-up analysis for the corresponding Euler-Lagrange equation, which requires new sharp…

Analysis of PDEs · Mathematics 2019-04-24 Gabriele Mancini , Luca Martinazzi

We present a construction of harmonic functions on bounded domains for the spectral fractional Laplacian operator and we classify them in terms of their divergent profile at the boundary. This is used to establish and solve boundary value…

Analysis of PDEs · Mathematics 2015-09-22 Nicola Abatangelo , Louis Dupaigne

It is established $L^{p}$ estimates for the fractional $\Phi$-Laplacian operator defined in bounded domains where the nonlinearity is subcritical or critical in a suitable sense. Furthermore, using some fine estimates together with the…

Analysis of PDEs · Mathematics 2021-11-11 M. L. Carvalho , E. D. Silva , J. C. de Albuquerque , S. Bahrouni

We investigate the existence of ground state solutions for a class of nonlinear scalar field equations defined on whole real line, involving a fractional Laplacian and nonlinearities with Trudinger-Moser critical growth. We handle the lack…

Analysis of PDEs · Mathematics 2016-08-08 João Marcos do Ó , Olímpio H. Miyagaki , Marco Squassina

In this paper we prove the existence of a weak solution to a doubly nonlinear parabolic fractional $p$-Laplacian equation, which has general doubly non-linearlity including not only the Sobolev subcritical/critical/supercritical cases but…

Analysis of PDEs · Mathematics 2023-05-02 Nobuyuki Kato , Masashi Misawa , Kenta Nakamura , Yoshihiko Yamaura