scholarly journals Existence and Multiplicity of Positive Solutions for Kirchhoff-Type Equations with the Critical Sobolev Exponent

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Junjun Zhou ◽  
Xiangyun Hu ◽  
Tiaojie Xiao
Keyword(s):  
Critical Exponent ◽  
Positive Solutions ◽  
Mountain Pass Theorem ◽  
Critical Sobolev Exponent ◽  
Mountain Pass ◽  
Kirchhoff Type ◽  
Existence And Multiplicity ◽  
Sobolev Exponent ◽  
Multiplicity Of Positive Solutions ◽  
Kirchhoff Type Problems

In this paper, we consider the following Kirchhoff-type problems involving critical exponent −a+b∫Ω∇u2dxΔu+Vxu=μu2∗−1+λgx,u, x∈Ωu>0, x∈Ωu=0, x∈∂Ω. The existence and multiplicity of positive solutions for Kirchhoff-type equations with a nonlinearity in the critical growth are studied under some suitable assumptions on Vx and gx,u. By using the mountain pass theorem and Brézis–Lieb lemma, the existence and multiplicity of positive solutions are obtained.

scholarly journals Superlinear Schrödinger–Kirchhoff type problems involving the fractional p–Laplacian and critical exponent

2019 ◽  
Vol 9 (1) ◽  
pp. 690-709 ◽  
Author(s):  
Mingqi Xiang ◽  
Binlin Zhang ◽  
Vicenţiu D. Rădulescu
Keyword(s):  
Critical Exponent ◽  
Nonlocal Problem ◽  
Growth Conditions ◽  
Infinitely Many Solutions ◽  
Kirchhoff Type ◽  
Existence And Multiplicity ◽  
Concentration Compactness Principle ◽  
Superlinear Growth ◽  
Sobolev Exponent ◽  
Kirchhoff Type Problems

Abstract This paper concerns the existence and multiplicity of solutions for the Schrődinger–Kirchhoff type problems involving the fractional p–Laplacian and critical exponent. As a particular case, we study the following degenerate Kirchhoff-type nonlocal problem: $$\begin{align}& \left\| u \right\|_{\lambda }^{\left( \theta -1 \right)p}\left[ \lambda \left( -\Delta \right)_{p}^{s}u+V\left( x \right){{\left| u \right|}^{p-2}}u \right]={{\left| u \right|}^{p_{s}^{\star }-2}}u+f\left( x,u \right)\,in\,{{\mathbb{R}}^{N}}, \\ & {{\left\| u \right\|}_{\lambda }}={{\left( \lambda \int\limits_{\mathbb{R}}{\int\limits_{2N}{\frac{{{\left| u\left( x \right)-u\left( y \right) \right|}^{p}}}{{{\left| x-y \right|}^{N+ps}}}}dxdy+\int\limits_{{{\mathbb{R}}^{N}}}{V\left( x \right){{\left| u \right|}^{p}}dx}} \right)}^{{1}/{p}\;}} \\ \end{align}$$ where $\left( -\Delta \right)_{p}^{s}$is the fractional p–Laplacian with 0 < s < 1 < p < N/s, $p_{s}^{\star }={Np}/{\left( N-ps \right)}\;$is the critical fractional Sobolev exponent, λ > 0 is a real parameter, $1<\theta \le {p_{s}^{\star }}/{p}\;,$and f : ℝN × ℝ → ℝ is a Carathéodory function satisfying superlinear growth conditions. For $\theta \in \left( 1,{p_{s}^{\star }}/{p}\; \right),$by using the concentration compactness principle in fractional Sobolev spaces, we show that if f(x, t) is odd with respect to t, for any m ∈ ℕ+ there exists a Λm > 0 such that the above problem has m pairs of solutions for all λ ∈ (0, Λm]. For $\theta ={p_{s}^{\star }}/{p}\;,$by using Krasnoselskii’s genus theory, we get the existence of infinitely many solutions for the above problem for λ large enough. The main features, as well as the main difficulties, of this paper are the facts that the Kirchhoff function is zero at zero and the potential function satisfies the critical frequency infx∈ℝ V(x) = 0. In particular, we also consider that the Kirchhoff term satisfies the critical assumption and the nonlinear term satisfies critical and superlinear growth conditions. To the best of our knowledge, our results are new even in p–Laplacian case.

Multiple positive solutions for indefinite semilinear elliptic problems involving a critical Sobolev exponent

2014 ◽  
Vol 144 (4) ◽  
pp. 691-709 ◽  
Author(s):  
Ching-yu Chen ◽  
Tsung-fang Wu
Keyword(s):  
Positive Solutions ◽  
Critical Sobolev Exponent ◽  
Nehari Manifold ◽  
Multiple Positive Solutions ◽  
Existence And Multiplicity ◽  
Semilinear Elliptic Problems ◽  
Sobolev Exponent ◽  
Multiplicity Of Positive Solutions ◽  
The Nehari Manifold ◽  
Indefinite Elliptic Problem

In this paper, we study the decomposition of the Nehari manifold by exploiting the combination of concave and convex nonlinearities. The result is subsequently used, in conjunction with the Ljusternik–Schnirelmann category and variational methods, to prove the existence and multiplicity of positive solutions for an indefinite elliptic problem involving a critical Sobolev exponent.

Multiple solutions for nonhomogeneous elliptic equations involving critical Sobolev exponent

1994 ◽  
Vol 124 (6) ◽  
pp. 1177-1191 ◽  
Author(s):  
Dao-Min Cao ◽  
Gong-Bao Li ◽  
Huan-Song Zhou
Keyword(s):  
Variational Principle ◽  
Energy Balance ◽  
Positive Solutions ◽  
Elliptic Equations ◽  
Multiple Solutions ◽  
Mountain Pass Theorem ◽  
Critical Sobolev Exponent ◽  
Mountain Pass ◽  
Sobolev Exponent ◽  
Image Position

We consider the following problem:where is continuous on RN and h(x)≢0. By using Ekeland's variational principle and the Mountain Pass Theorem without (PS) conditions, through a careful inspection of the energy balance for the approximated solutions, we show that the probelm (*) has at least two solutions for some λ* > 0 and λ ∈ (0, λ*). In particular, if p = 2, in a different way we prove that problem (*) with λ ≡ 1 and h(x) ≧ 0 has at least two positive solutions as

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