arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 2602.03299math.AP
收藏

关于涉及分数GJMS算子的Poincaré-Sobolev层级的论文

On Poincaré--Sobolev Levels for Fractional GJMS Operators on Hyperbolic Space

Huyuan Chen, Rui Chen

AI总结:

本文研究了分数GJMS算子与Poincaré-Sobolev层级的性质,通过重新诠释Brezis-Nirenberg问题并建立新的Hardy下界,证明了在双曲空间上该问题的解的存在性。

摘要:

本文致力于分析与分数GJMS算子\\(\mathcal{P}_s\\)(\\(s\in(0,\tfrac n2)\setminus\mathbb N\\))相关的Poincaré-Sobolev层级的定性分析。与整数阶情况不同,当\\(s\notin\mathbb N\\)时,算子\\(\mathcal{P}_s\\)不具有符合性协变性,这使得在上半空间或球面模型中将其与欧几里得分数拉普拉斯算子\\((-\Delta)^s\\)相关联变得困难;这种联系对于引入欧几里得理论至关重要。因此,我们引入\\(\widetilde{\mathcal{P}}_s\\)(\\(s>0\\)),它与\\((-\Delta)^s\\)具有符合性关系。本文的目的在于分析与\\(\mathcal{P}_s\\)和\\(\widetilde{\mathcal{P}}_s\\)相关的Poincaré-Sobolev层级的单调性、可达到性和严格间隙区域。首先,我们通过Poincaré-Sobolev层级的视角重新诠释Brezis-Nirenberg问题,将之前针对欧几里得拉普拉斯算子和整数阶\\(k\in(0,\tfrac n2)\\)的算子\\(\mathcal{P}_k\\)在\\(\mathbb H^n\\)上的结果联系起来。然后,我们建立了涉及\\(\mathcal{P}_s\\)和\\(\widetilde{\mathcal{P}}_s\\)的分数Hardy-Sobolev-Maz'ya不等式中Hardy项的新、明确的下界。通过应用集中-紧致性原理并详细分析Poincaré-Sobolev层级的严格间隙区域,我们证明了在\\(\mathbb H^n\\)上针对这两个算子的Brezis-Nirenberg问题的解的存在性。最后,结合Hardy下界与可达到性标准,我们获得了Poincaré-Sobolev层级\\(H_{n,s}\\)和\\(\widetilde H_{n,s}\\)的完整特征化。

英文摘要:

We study the monotonicity, attainment, and strict-gap regions of the Poincaré--Sobolev levels associated with fractional GJMS operators $P_s$ on hyperbolic space, where $0<s<n/2$. For noninteger $s$, $P_s$ is not conformally intertwined with the Euclidean fractional Laplacian $(-Δ)^s$, and we therefore also consider an auxiliary family $\widetilde{P}_s$ for which this intertwining property holds. We establish explicit lower bounds for the Hardy term in the corresponding fractional Hardy--Sobolev--Maz'ya inequalities and derive strict-gap regimes for both families. To prove attainment, we decompose minimizing sequences into bounded-frequency and high-frequency parts. The high-frequency contribution is controlled by the spectral growth of the multipliers, while the bounded-frequency part, after suitable hyperbolic isometries, yields a nonzero weak limit, including at the spectral bottom. The Brezis--Lieb lemma then gives strong convergence and attainment of the infimum. Consequently, the corresponding Brezis--Nirenberg problems admit nontrivial weak solutions for parameters at or below the respective spectral bottoms: for all subcritical exponents, and for the critical exponent under the strict-gap condition. These results extend the corresponding integer-order theory to fractional GJMS operators.

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。

↑