arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2106.07593math.AP
收藏

$H^s(Ω)$能量极小元的整体Schauder理论

Global Schauder theory for minimizers of the $H^s(Ω)$ energy

Mouhamed Moustapha Fall, Xavier Ros-Oton

摘要:

研究了泛函$\mathcal E(u):= [u]_{H^s(Ω)}^2 +\int_Ωfu$极小元的正则性。这对应于理解$Ω\subset\mathbb R^N$中的区域分数拉普拉斯算子的解。更确切地说,我们感兴趣的是解的全局(直到边界)正则性,无论是在$H^s(Ω)$中的自由极小值的情况下(即,Neumann问题),或者在Dirichlet条件$u\in H^s_0(Ω)$的情况下当$s>\frac12$。我们的主要结果建立了两种情况下的解决方案的尖锐的正则性:$u\in C^{2s+α}(\overlineΩ)$在诺依曼的情况下,和$u/δ^{2s-1}\in C^{1+α}(\overlineΩ)$在狄利克雷的情况下。这里,$δ$是到$\partialΩ$和$α<α_s$的距离,其中$α_s\in (0,1-s)$和$2s+α_s>1$。我们还证明了我们的结果的最优性:这些估计失败的$α>α_s$,即使当$f$和$\partialΩ$是$C^\infty$。

英文摘要:

We study the regularity of minimizers of the functional $\mathcal E(u):= [u]_{H^s(Ω)}^2 +\int_Ωfu$. This corresponds to understanding solutions for the regional fractional Laplacian in $Ω\subset\mathbb R^N$. More precisely, we are interested on the global (up to the boundary) regularity of solutions, both in the case of free minimizers in $H^s(Ω)$ (i.e., Neumann problem), or in the case of Dirichlet condition $u\in H^s_0(Ω)$ when $s>\frac12$. Our main result establishes the sharp regularity of solutions in both cases: $u\in C^{2s+α}(\overlineΩ)$ in the Neumann case, and $u/δ^{2s-1}\in C^{1+α}(\overlineΩ)$ in the Dirichlet case. Here, $δ$ is the distance to $\partialΩ$, and $α<α_s$, with $α_s\in (0,1-s)$ and $2s+α_s>1$. We also show the optimality of our result: these estimates fail for $α>α_s$, even when $f$ and $\partialΩ$ are $C^\infty$.

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。

↑