Symmetry breaking for semilinear elliptic equations on sectorial domains in ℝ2

1991 ◽  
Vol 118 (3-4) ◽  
pp. 327-353
Author(s):  
Song-Sun Lin
Keyword(s):  
Symmetry Breaking ◽  
Poisson Equation ◽  
Elliptic Equations ◽  
Semilinear Elliptic Equations ◽  
Complete Picture ◽  
Fredholm Alternative ◽  
Alternative Theory ◽  
Semilinear Elliptic ◽  
The Poisson Equation ◽  
Sectorial Domains

SynopsisWe first study the Poisson equation Δu =fin Ώω,and, where Ωω= {(rcos θ,rsin θ): 0<r<1, θ ∈(0,ω)} is a sector in ℝ2, ω ∈ (0, 2π), Г0= {(cos θ, sin θ): θ ∈ (0, ω)} and Г1= ∂Ωω− Г0,band λ are in ℝ1. We obtain Schauder-type estimates and Fredholm alternative theory for the problem. We then study the symmetry breaking problem for the Gel'fand equation Δu+ λeu= 0 in Ωωand obtain a complete picture about the relationships among three parameters λ,b, and ω in the problem.

scholarly journals Structure Results for Semilinear Elliptic Equations with Hardy Potentials

2018 ◽  
Vol 18 (1) ◽  
pp. 65-85 ◽  
Author(s):  
Matteo Franca ◽  
Maurizio Garrione
Keyword(s):  
Dynamical System ◽  
Invariant Manifold ◽  
Elliptic Equations ◽  
Semilinear Elliptic Equations ◽  
Complete Picture ◽  
Radial Solutions ◽  
Semilinear Elliptic ◽  
Slow Decay ◽  
Manifold Theory ◽  
Semilinear Problem

AbstractWe prove structure results for the radial solutions of the semilinear problem\Delta u+\frac{\lambda(|x|)}{|x|^{2}}u+f(u(x),|x|)=0,where λ is afunctionandfis superlinear in theu-variable. As particular cases, we are able to deal with Matukuma potentials and with nonlinearitiesfhaving different polynomial behaviors at zero and at infinity. We give the complete picture for the subcritical, critical and supercritical cases. The technique relies on the Fowler transformation, allowing to deal with a dynamical system in{{\mathbb{R}}^{3}}, for which elementary invariant manifold theory allows to draw the conclusions involving regular/singular and fast/slow-decay solutions.

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