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arXiv 2408.04602math.AP
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从变阶Sobolev空间到$L^{q(x)}(Ω)$的紧嵌入及其在具有变阶和变临界指数的Choquard方程中的应用

Compact embedding from variable-order Sobolev space to $L^{q(x)}(Ω)$ and its application to Choquard equation with variable order and variable critical exponent

Masaki Sakuma

AI总结:

本文证明变阶Sobolev空间到Nakano空间的紧嵌入,即使临界指数达到临界Sobolev指数也成立,并应用于获得具有变阶和变临界指数的Choquard方程的非平凡解。

摘要:

本文证明了从变阶Sobolev空间$W^{s(x,y),p(x,y)}_0 (Ω)$到Nakano空间$L^{q(x)}(Ω)$的紧嵌入,其中临界指数$q(x)$满足某些条件。值得注意的是,即使当$q(x)$达到临界Sobolev指数$p_s^*(x)$时,该嵌入也可以是紧的。作为应用,我们在适当的边界条件下,获得了Choquard方程\begin{equation*} \displaystyle (-Δ)_{p(\cdot,\cdot)}^{s(\cdot,\cdot)}u+|u|^{p(x,x)-2}u=\left(\int_Ω\frac{|u(y)|^{r(y)}}{|x-y|^{\frac{α(x)+α(y)}{2}}}dy\right) |u(x)|^{r(x)-2}u(x)\quad\text{in $Ω$} \end{equation*}的一个非平凡解,该方程在Hardy-Littlewood-Sobolev不等式意义下具有变上临界指数。

英文摘要:

In this paper, we prove the compact embedding from the variable-order Sobolev space $W^{s(x,y),p(x,y)}_0 (Ω)$ to the Nakano space $L^{q(x)}(Ω)$ with a critical exponent $q(x)$ satisfying some conditions. It is noteworthy that the embedding can be compact even when $q(x)$ reaches the critical Sobolev exponent $p_s^*(x)$. As an application, we obtain a nontrivial solution of the Choquard equation \begin{equation*} \displaystyle (-Δ)_{p(\cdot,\cdot)}^{s(\cdot,\cdot)}u+|u|^{p(x,x)-2}u=\left(\int_Ω\frac{|u(y)|^{r(y)}}{|x-y|^{\frac{α(x)+α(y)}{2}}}dy\right) |u(x)|^{r(x)-2}u(x)\quad\text{in $Ω$} \end{equation*} with variable upper critical exponent in the sense of Hardy-Littlewood-Sobolev inequality under an appropriate boundary condition.

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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