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arXiv 2010.04467math.AP
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变指数双相变分问题的多解性

Multiple solutions of double phase variational problems with variable exponent

Xiayang Shi, Vicenţiu D. Rădulescu, Dušan D. Repovš, Qihu Zhang

摘要:

本文讨论了拟线性方程$-\mathrm{div}\,\mathbf{A}(x,\nabla u)| u| ^{α(x)-2}u=f(x,u)$在$ \mathbb{R} ^{N}$中多解的存在性,其中涉及一个一般的变指数椭圆算子$\mathbf{ A}$.该问题对应于双相各向异性现象,在这个意义上,微分算子具有类似于小$| ξ| $的$ | ξ| ^{q(x)-2}ξ$和类似于大$ | ξ| $的$| ξ| ^{p(x)-2}ξ$的行为,其中$1<α(\cdot )\leq p(\cdot )<q(\cdot )<N$。我们的目的是在变指数的广义Orlicz-Sobolev空间中,利用临界点理论的工具,变分地研究这个问题。我们的结果扩展了以前的工作Azzollini,d 'Avenia和Pomponio(2014)和Chorfi和Rendulescu(2016),从指数$p$和$q$是常数的情况,到$p(\cdot )$和$% q(\cdot )$是函数的情况。我们还大大削弱了他们的一些假设,克服了缺乏紧凑性,通过使用加权方法。

英文摘要:

This paper deals with the existence of multiple solutions for the quasilinear equation $-\mathrm{div}\,\mathbf{A}(x,\nabla u)| u| ^{α(x)-2}u=f(x,u)$ in $ \mathbb{R} ^{N}$, which involves a general variable exponent elliptic operator $\mathbf{ A}$ in divergence form. The problem corresponds to double phase anisotropic phenomena, in the sense that the differential operator has behaviors like $ | ξ| ^{q(x)-2}ξ$ for small $| ξ| $ and like $| ξ| ^{p(x)-2}ξ$ for large $ | ξ| $, where $1<α(\cdot )\leq p(\cdot )<q(\cdot )<N$. Our aim is to approach variationally the problem by using the tools of critical points theory in generalized Orlicz-Sobolev spaces with variable exponent. Our results extend the previous works Azzollini, d'Avenia, and Pomponio (2014) and Chorfi and Rădulescu (2016), from the case when exponents $p$ and $q$ are constant, to the case when $p(\cdot )$ and $% q(\cdot )$ are functions. We also substantially weaken some of their hypotheses overcome the lack of compactness by using the weighting method.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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