Results 21 to 30 of about 70,966 (297)

RADIAL SYMMETRY OF POSITIVE SOLUTIONS TO EQUATIONS INVOLVING THE FRACTIONAL LAPLACIAN [PDF]

open access: yesCommunications in Contemporary Mathematics, 2014
The aim of this paper is to study radial symmetry and monotonicity properties for positive solution of elliptic equations involving the fractional Laplacian. We first consider the semi-linear Dirichlet problem [Formula: see text] where (-Δ)αdenotes the fractional Laplacian, α ∈ (0, 1), and B1denotes the open unit ball centered at the origin in ℝNwith N
Felmer, Patricio, Wang, Ying
openaire   +6 more sources

On Kirchhoff-Type Equations with Hardy Potential and Berestycki–Lions Conditions

open access: yesMathematics, 2023
The purpose of this paper is to investigate the existence and asymptotic properties of solutions to a Kirchhoff-type equation with Hardy potential and Berestycki–Lions conditions.
Hua Yang, Jiu Liu
doaj   +1 more source

On a radial positive solution to a nonlocal elliptic equation

open access: yesTopological Methods in Nonlinear Analysis, 2003
The paper deals with Dirichlet boundary value problem for the nonlinear Poisson equation with nonlocal term \[ - \Delta u = f (u, \int_U g \circ u) \] \[ u| _{\partial U} = 0, \] where \(U\) is assumed to be an annulus or a ball. Existence of solutions is obtained via fixed point theorems for increasing compact operators.
Fijałkowski, Piotr, Przeradzki, Bogdan
openaire   +3 more sources

Spherically symmetric solutions in Rastall gravity

open access: yes上海师范大学学报. 自然科学版, 2023
In this paper, we consider the spherically symmetric solutionstothe field equation of Rastall gravity in the background of positive pressure matter.Firstly,we study the spherically symmetric solution in Rastall gravityin the background of matter with ...
XI Ping   +3 more
doaj   +1 more source

Folded Radial Forearm Free Flap for the Reconstruction of Total Soft Palate Defects: Operative Technique

open access: yesPlastic and Reconstructive Surgery, Global Open, 2023
Background:. The surgical plan to reconstruct the palate must be carefully prepared given the morphological peculiarity of the soft palate forming both the roof of the mouth and the floor of the nasal cavity.
Riccardo Nocini, MD   +5 more
doaj   +1 more source

Structure of Positive Radial Solutions of Semilinear Elliptic Equations

open access: yesJournal of Differential Equations, 1997
This article primarily concerns uniqueness and asymptotic behavior of positive radial solutions to the semilinear problems (1) \(-\Delta u=f(u)\) in \(\mathbb{R}^n\), \(u(\infty)=0\); and (2) \(-\Delta u=f(u)\) in \(B\), \(u|_{\partial B}=0\), where \(B\) denotes a ball in \(\mathbb{R}^n\) centred at the origin, and \(f(t)= \min\{t^p,t^q\}\) for ...
Erbe, Lynn, Tang, Moxun
openaire   +1 more source

Existence of radial solutions for a p ( x ) $p(x)$ -Laplacian Dirichlet problem

open access: yesAdvances in Difference Equations, 2021
In this paper, using variational methods, we prove the existence of at least one positive radial solution for the generalized p ( x ) $p(x)$ -Laplacian problem − Δ p ( x ) u + R ( x ) u p ( x ) − 2 u = a ( x ) | u | q ( x ) − 2 u − b ( x ) | u | r ( x ) −
Maria Alessandra Ragusa   +2 more
doaj   +1 more source

Existence of Positive Ground State Solutions for Choquard Systems

open access: yesAdvanced Nonlinear Studies, 2020
We study the existence of positive ground state solution for Choquard systems. In the autonomous case, we prove the existence of at least one positive ground state solution by the Pohozaev manifold method and symmetric-decreasing rearrangement arguments.
Deng Yinbin, Jin Qingfei, Shuai Wei
doaj   +1 more source

Three positive radial solutions for elliptic equations in a ball

open access: yesApplied Mathematics Letters, 2005
The authors consider the second-order elliptic problem of the form \[ -\Delta u=\lambda\cdot k(|x|) f(u),\quad u> 0\quad\text{in }\Omega,\quad u= a\quad\text{on }\partial\Omega,\tag{1} \] where \(\Omega\) is the ball of radius \(R_0\); \(\lambda\), \(a\) are positive parameters; \(f\in C([0,+\infty), [0,+\infty))\) is a increasing function and \(k\in C(
João Marcos do Ó   +2 more
openaire   +3 more sources

Home - About - Disclaimer - Privacy