scholarly journals Nonradial blow-up solutions of sublinear elliptic equations with gradient term

2004 ◽  
Vol 3 (3) ◽  
pp. 465-474 ◽  
Author(s):  
Vicenţiu Rădulescu ◽  
Marius Ghergu
Keyword(s):  
Elliptic Equations ◽  
Blow Up ◽  
Gradient Term

Boundary blow-up solutions for elliptic equations with gradient terms and singular weights: existence, asymptotic behaviour and uniqueness

2011 ◽  
Vol 141 (4) ◽  
pp. 717-737 ◽  
Author(s):  
Yujuan Chen ◽  
Mingxin Wang
Keyword(s):  
Asymptotic Behaviour ◽  
Elliptic Equations ◽  
Blow Up ◽  
Uniqueness Result ◽  
Gradient Term ◽  
Singular Weights

This paper deals with the non-negative boundary blow-up solutions of the equation ∆u = b(x)up + c(x)uσ|∇u|q in Ω ⊂ ℝ,N, where b(x), c(x) ∈ Cγ (Ω,ℝ+) for some 0 < γ < 1 and can be vanishing or singular on the boundary, and p, σ and q are non-negative constants. The existence and asymptotic behaviour of such a solution near the boundary are investigated, and we show how the nonlinear gradient term affects the results. As a consequence of the asymptotic behaviour, we also show the uniqueness result.

Multiple boundary blow-up solutions for nonlinear elliptic equations

2003 ◽  
Vol 133 (2) ◽  
pp. 225-235 ◽  
Author(s):  
Amandine Aftalion ◽  
Manuel del Pino ◽  
René Letelier
Keyword(s):  
Elliptic Equations ◽  
Blow Up ◽  
A Priori ◽  
Nonlinear Elliptic Equations ◽  
Positive Parameter ◽  
Number Of Solutions ◽  
Bounded Smooth Domain ◽  
Nonlinear Elliptic ◽  
Bounded Smooth

We consider the problem Δu = λf(u) in Ω, u(x) tends to +∞ as x approaches ∂Ω. Here, Ω is a bounded smooth domain in RN, N ≥ 1 and λ is a positive parameter. In this paper, we are interested in analysing the role of the sign changes of the function f in the number of solutions of this problem. As a consequence of our main result, we find that if Ω is star-shaped and f behaves like f(u) = u(u−a)(u−1) with ½ < a < 1, then there is a solution bigger than 1 for all λ and there exists λ0 > 0 such that, for λ < λ0, there is no positive solution that crosses 1 and, for λ > λ0, at least two solutions that cross 1. The proof is based on a priori estimates, the construction of barriers and topological-degree arguments.

Blow-up solutions for asymptotically critical elliptic equations on Riemannian manifolds

2009 ◽  
Vol 58 (4) ◽  
pp. 1719-1746 ◽  
Author(s):  
Anna Maria Micheletti ◽  
Angela Pistoia ◽  
Jerome Vetois
Keyword(s):  
Riemannian Manifolds ◽  
Elliptic Equations ◽  
Blow Up

Boundary blow up solutions for fractional elliptic equations

2012 ◽  
Vol 78 (3) ◽  
pp. 123-144 ◽  
Author(s):  
Patricio Felmer ◽  
Alexander Quaas
Keyword(s):  
Elliptic Equations ◽  
Blow Up
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