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arXiv 2210.01079math.AP
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分数阶 Dirichlet 次线性型问题的小阶极限

Small order limit of fractional Dirichlet sublinear-type problems

Felipe Angeles, Alberto Saldaña

AI总结:

本文研究了分数阶参数趋于零时分数阶 Laplacian 的 Dirichlet 次线性型问题解的渐近行为,揭示了正解收敛于示性函数或对数 Laplacian 极限问题解,并给出了次线性对数问题极小能量解的存在唯一性与正则性。

摘要:

我们研究当分数阶参数 s 趋于零时,涉及分数阶 Laplacian 的各类 Dirichlet 次线性型问题解的渐近行为。根据非线性类型的不同,正解可能收敛于示性函数,或收敛于关于对数 Laplacian(即具有傅里叶符号 ln(|ξ|^2) 的伪微分算子)的极限非线性问题的正解。在 logistic 型非线性的情况下,我们的结果具有以下生物学解释:在存在毒性边界时,移动性降低的物种具有更低的饱和阈值、更高的存活率,且分布更均匀。作为一项独立兴趣的结果,我们证明了次线性对数问题存在唯一的极小能量解,该解有界且 Dini 连续,并具有对数 Hölder 连续模。

英文摘要:

We study the asymptotic behavior of solutions to various Dirichlet sublinear-type problems involving the fractional Laplacian when the fractional parameter s tends to zero. Depending on the type on nonlinearity, positive solutions may converge to a characteristic function or to a positive solution of a limit nonlinear problem in terms of the logarithmic Laplacian, that is, the pseudodifferential operator with Fourier symbol $\ln(|ξ|^2)$. In the case of a logistic-type nonlinearity, our results have the following biological interpretation: in the presence of a toxic boundary, species with reduced mobility have a lower saturation threshold, higher survival rate, and are more homogeneously distributed. As a result of independent interest, we show that sublinear logarithmic problems have a unique least-energy solution, which is bounded and Dini continuous with a log-Hölder modulus of continuity.

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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