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首页> 外文期刊>Discrete and continuous dynamical systems >EXISTENCE OF MULTIPLE SOLUTIONS FOR A NONHOMOGENEOUS SEMILINEAR ELLIPTIC EQUATION INVOLVING CRITICAL EXPONENT
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EXISTENCE OF MULTIPLE SOLUTIONS FOR A NONHOMOGENEOUS SEMILINEAR ELLIPTIC EQUATION INVOLVING CRITICAL EXPONENT

机译:含临界指数的非齐次椭圆方程多个解的存在性。

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摘要

In this paper, we consider the following problem {-△u + u = u~(2*-1) + λ(f(x,u)+h(x)) in R~N,(*) u ∈ H~1(R~N), u > 0 in R~N, where λ > 0 is a parameter, 2* = (2N)/(N-2) is the critical Sobolev exponent and N > 4, f(x, t) and h(x) are some given functions. We prove that there exists 0 < λ~* < +∞ such that (*) has exactly two positive solutions for λ ∈ (0, λ*) by Barrier method and Mountain Pass Lemma and no positive solutions for λ > λ*. Moreover, if λ = λ*, (*) has a unique solution (λ*,u_(λ*)), which means that (λ*,u_(λ*)) is a turning point in H~1(R~N) for problem (*).
机译:本文考虑R〜N,(*)u∈H中的以下问题{-△u + u = u〜(2 * -1)+λ(f(x,u)+ h(x)) 〜1(R〜N),在R〜N中u> 0,其中λ> 0是参数,2 * =(2N)/(N-2)是临界Sobolev指数,N> 4,f(x, t)和h(x)是一些给定的函数。我们证明存在0 <λ〜* <+∞,使得(*)通过屏障方法和Mountain Pass引理对λ∈(0,λ*)具有正解,而对于λ>λ*没有正解。此外,如果λ=λ*,则(*)具有唯一解(λ*,u_(λ*)),这意味着(λ*,u_(λ*))是H〜1(R〜 N)表示问题(*)。

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