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We study the existence of positive solutions for nonlocal systems in gradient form and set in the whole $\mathbb R^N$. A quasilinear fractional Schr\"odinger equation, where the leading operator is the $\frac Ns$-fractional Laplacian, is…

Analysis of PDEs · Mathematics 2025-07-23 Daniele Cassani , Zhisu Liu , Giulio Romani

We study the existence of positive solutions for a class of systems which strongly couple a quasilinear Schr\"odinger equation driven by a weighted $N$-Laplace operator and without the mass term, and a higher-order fractional Poisson…

Analysis of PDEs · Mathematics 2025-07-23 Giulio Romani

We consider the $N$-Laplacian Schr\"odinger equation strongly coupled with higher order fractional Poisson's equations. When the order of the Riesz potential $\alpha$ is equal to the Euclidean dimension $N$, and thus it is a logarithm, the…

Analysis of PDEs · Mathematics 2022-01-04 Claudia Bucur , Daniele Cassani , Cristina Tarsi

In this paper, we consider a fractional p-Laplacian system of equations in the entire space RN with doubly critical singular nonlinearities involving a local critical Sobolev term together with a nonlocal Choquard critical term; the problem…

Analysis of PDEs · Mathematics 2024-12-16 Ronaldo B. Assunção , Olímpio H. Miyagaki , Rafaella F. S. Siqueira

We provide an existence result for a Schr\"odinger-Poisson system in gradient form, set in the whole plane, in the case of zero mass. Since the setting is limiting for the Sobolev embedding, we admit nonlinearities with subcritical or…

Analysis of PDEs · Mathematics 2025-07-23 Federico Bernini , Giulio Romani , Cristina Tarsi

We consider the Schr\"odinger-Poisson system in the two-dimensional whole space. A new formula of solutions to the Poisson equation is used. Although the potential term solving the Poisson equation may grow at the spatial infinity, we show…

Analysis of PDEs · Mathematics 2009-12-09 Satoshi Masaki

We consider the following doubly nonlocal nonlinear logistic problem driven by the fractional $p$-Laplacian \begin{equation*} \pl u = f(x,u) -\cq ~\text{in}~ \O, ~u=0 ~\text{in}~ \Rn\setminus\O. \end{equation*} Here $ \O \subset \Rn…

Analysis of PDEs · Mathematics 2023-10-09 G. C. Anthal , J. Giacomoni , K. Sreenadh

Let $\sigma\in(0,1)$ with $\sigma\neq\frac{1}{2}$. We investigate the fractional nonlinear Schr\"odinger equation in $\mathbb R^d$: $$i\partial_tu+(-\Delta)^\sigma u+\mu|u|^{p-1}u=0,\, u(0)=u_0\in H^s,$$ where $(-\Delta)^\sigma$ is the…

Analysis of PDEs · Mathematics 2015-01-08 Younghun Hong , Yannick Sire

In this paper, we extend the fractional Sobolev spaces with variable exponents $W^{s,p(x,y)}$ to include the general fractional case $W^{K,p(x,y)}$, where $p$ is a variable exponent, $s\in (0,1)$ and $K$ is a suitable kernel. We are…

Analysis of PDEs · Mathematics 2019-12-02 Elhoussine Azroul , Abdelmoujib Benkirane , Mohammed Shimi

In this paper, we prove a new continuous embedding theorem for fractional Sobolev spaces with variable exponents into variable exponent Lebesgue spaces on unbounded domains. As an application, we study a class of nonlocal elliptic problems…

Analysis of PDEs · Mathematics 2025-09-03 Abdelkrim Barbara , Ahmed Bousmaha , Mohammed Shimi

In this paper, we consider in $R^n$ the Cauchy problem for nonlinear Schr\"odinger equation with initial data in Sobolev space $W^{s,p}$ for $p<2$. It is well known that this problem is ill posed. However, We show that after a linear…

Analysis of PDEs · Mathematics 2007-05-23 Yi Zhou

In this paper, we investigate the existence of weak solution for a fractional type problems driven by a nonlocal operator of elliptic type in a fractional Orlicz-Sobolev space, with homogeneous Dirichlet boundary conditions. We first extend…

Analysis of PDEs · Mathematics 2020-04-03 Elhoussine Azroul , Abdelmoujib Benkirane , Mohammed Srati

In this paper, we study the $2$D cubic nonlinear Schr\"odinger equation (NLS) with the partial harmonic potential. First, we prove the local well-posedness in Bourgain spaces by establishing a key bilinear estimate associated with the…

Analysis of PDEs · Mathematics 2025-12-02 Mingming Deng , Xiaoyan Su , Jiqiang Zheng

We are concerned with the two-power nonlinear Schr\"odinger-type equations with non-local terms. We consider the framework of Sobolev-Lorentz spaces which contain singular functions with infinite-energy. Our results include global…

Analysis of PDEs · Mathematics 2019-10-02 Vanessa Barros , Lucas C. F. Ferreira , Ademir Pastor

We consider nonlinear dispersive equations of Schr\"odinger-type involving fractional powers $0<s\le 1$ of the Laplacian and a defocusing power-law nonlinearity. We conduct numerical simulations in the case of small, energy supercritical…

Analysis of PDEs · Mathematics 2025-02-12 Christian Klein , Christof Sparber

In this paper we consider a fractional $p$-Laplacian equation in the entire space $\mathbb{R}^{N}$ with doubly critical singular nonlinearities involving a local critical Sobolev term together with a nonlocal Choquard critical term; the…

Analysis of PDEs · Mathematics 2023-11-03 Ronaldo B. Assunção , Olímpio H. Miyagaki , Rafaella F. S. Siqueira

In this work we analyze a class of nonlinear fractional elliptic systems involving Hardy--type potentials and coupled by critical Hardy-Sobolev--type nonlinearities in $\mathbb{R}^N$. Due to the lack of compactness at the critical exponent…

Analysis of PDEs · Mathematics 2023-06-22 Alejandro Ortega

By exploiting a suitable Trudinger-Moser inequality for fractional Sobolev spaces, we obtain existence and multiplicity of solutions for a class of one-dimensional nonlocal equations with fractional diffusion and nonlinearity at exponential…

Analysis of PDEs · Mathematics 2013-11-12 Antonio Iannizzotto , Marco Squassina

Let $\Omega \subset \mathbb{R}^N$, $N \geq 2$, be a smooth bounded domain. For $s \in (1/2,1)$, we consider a problem of the form \[ \left\{\begin{aligned} (-\Delta)^s u & = \mu(x)\, \mathbb{D}_s^{2}(u) + \lambda f(x)\,, & \quad \mbox{in}…

Analysis of PDEs · Mathematics 2018-12-04 Boumediene Abdellaoui , Antonio J. Fernández

In the present work, we consider a fractional p-Kirchhoff equation in the entire space R^N featuring doubly nonlinearities, involving a generalized nonlocal Choquard subcritical term together with a local critical Sobolev term; the problem…

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