Results 41 to 50 of about 604 (96)

On the existence and multiplicity of topologically twisting incompressible $H$-harmonic maps and a structural H-condition

open access: yes, 2020
In this paper we address questions on the existence and multiplicity of solutions to the nonlinear elliptic system in divergence form ⎧⎨ ⎩ div (H∇u) = Hs|∇u|u+[cof∇u]∇P in Ω, det∇u = 1 in Ω, u = φ on ∂Ω.
George Morrison, A. Taheri
semanticscholar   +1 more source

Determination of AdS Monopole Wall via Minimization

open access: yes, 2019
In this note we solve a minimization problem arising in a recent work of Bolognesi and Tong on the determination of an AdS monopole wall. We show that the problem has a unique solution. Although the solution cannot be obtained explicitly, we show that it
Cao, Lei, Yang, Yisong
core   +1 more source

Ground states and multiple solutions for Hamiltonian elliptic system with gradient term

open access: yesAdvances in Nonlinear Analysis, 2020
This paper is concerned with the following nonlinear Hamiltonian elliptic system with gradient ...
Zhang Wen, Zhang Jian, Mi Heilong
doaj   +1 more source

A Fibering Map Approach for a Laplacian System With Sign-Changing Weight Function [PDF]

open access: yes, 2014
We prove the existence of at least two positive solutions for the Laplacian system(E?)On a bounded region by using the Nehari manifold and the fibering maps associated with the Euler functional for the ...
Kazemipoor, Seyyed Sadegh   +1 more
core  

Groundstates of the Choquard equations with a sign-changing self-interaction potential

open access: yes, 2018
We consider a nonlinear Choquard equation $$ -\Delta u+u= (V * |u|^p )|u|^{p-2}u \qquad \text{in }\mathbb{R}^N, $$ when the self-interaction potential $V$ is unbounded from below.
Battaglia, Luca, Van Schaftingen, Jean
core   +1 more source

Multiplicity of solutions for a nonhomogeneous quasilinear elliptic equation with concave-convex nonlinearities

open access: yesAdvances in Nonlinear Analysis
We investigate the multiplicity of solutions for a quasilinear scalar field equation with a nonhomogeneous differential operator defined bySu≔−divϕu2+∣∇u∣22∇u+ϕu2+∣∇u∣22u,Su:= -\hspace{0.1em}\text{div}\hspace{0.1em}\left\{\phi \left(\frac{{u}^{2 ...
Qi Wanting, Zhang Xingyong
doaj   +1 more source

The Dirac equation without spinors

open access: yes, 1998
In the first part of the paper we give a tensor version of the Dirac equation. In the second part we formulate and analyse a simple model equation which for weak external fields appears to have properties similar to those of the 2--dimensional Dirac ...
A Sudbery   +8 more
core   +3 more sources

The Interaction Between PDE and Graphs in Multiscale Modeling

open access: yes, 2016
In this article an upscaled model is presented, for complex networks with highly clustered regions exchanging some abstract quantities in both, microscale and macroscale level.
Morales, Fernando A   +1 more
core   +2 more sources

Multiplicity of semiclassical solutions for a class of nonlinear Hamiltonian elliptic system

open access: yesAdvances in Nonlinear Analysis
This article is concerned with the following Hamiltonian elliptic system: −ε2Δu+εb→⋅∇u+u+V(x)v=Hv(u,v)inRN,−ε2Δv−εb→⋅∇v+v+V(x)u=Hu(u,v)inRN,\left\{\begin{array}{l}-{\varepsilon }^{2}\Delta u+\varepsilon \overrightarrow{b}\cdot \nabla u+u+V\left(x)v={H}_ ...
Zhang Jian, Zhou Huitao, Mi Heilong
doaj   +1 more source

The Brezis–Nirenberg problem for nonlocal systems

open access: yesAdvances in Nonlinear Analysis, 2016
By means of variational methods we investigate existence, nonexistence as well as regularity of weak solutions for a system of nonlocal equations involving the fractional laplacian operator and with nonlinearity reaching the critical growth and ...
Faria Luiz F. O.   +4 more
doaj   +1 more source

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