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R中拟线性椭圆方程正解的存在性

On the existence of positive solutions for quasilinear elliptic equations on R
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摘要 考虑如下拟线性椭圆方程{-u″+a(x)u-k(u2)″u=b(x)|u|q-2u,x∈R,u→0,|x|→∞,(*)当k>0,4≤q<∞,且正函数a(x),b(x)满足一定假设条件下,克服该椭圆方程(*)的失紧性,利用Ekeland变分原理证明Palais-Smale序列的弱极限就是问题(*)的非平凡解.最后利用极值原理证明非平凡解是正解. In this paper,we are concerned with the existence of positive solutions for problem{-u″+a(x)u-k(u2)″u=b(x)|u|q-2u,x∈R,u→0,|x|→∞,(*) with some assumptions for positive functions a(x) and b(x),where k0,4≤q∞.Since the problem(*) losed the compactness,we use Ekeland variational principle to prove that the weak limit of Palais-Smale sequence is the nontrivial solution of problem(*) and we can also obtain that the nontrivial solution is positive.
出处 《华中师范大学学报(自然科学版)》 CAS CSCD 北大核心 2012年第1期14-17,共4页 Journal of Central China Normal University:Natural Sciences
基金 国家自然科学基金青年基金项目(1110134710901067)
关键词 存在性 正解 拟线性椭圆方程 existence positive solutions quasilinear elliptic equations
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参考文献6

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