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arXiv 2308.01366math.AP
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非紧致对称空间上分数阶拉普拉斯算子延拓问题解的渐近行为

Asymptotic behavior of solutions to the extension problem for the fractional Laplacian on noncompact symmetric spaces

Effie Papageorgiou

AI总结:

本文研究非紧致对称空间上分数阶拉普拉斯算子延拓问题解的长时间渐近行为,证明了双K-不变初值下解渐近趋于质量乘基本解,并揭示了特殊拉普拉斯算子情形下无需该假设的L1渐近收敛现象。

摘要:

本文研究非紧致型且一般秩的黎曼对称空间 $G/K$ 上分数阶拉普拉斯算子的延拓问题,该问题产生一族卷积算子,其中包括泊松算子。更确切地说,受欧氏情形下泊松半群结果的启发,我们研究 $L^1$ 初值条件下延拓问题解的长时间渐近行为。在拉普拉斯-贝尔特拉米算子的情形下,我们证明:若初值是双 $K$-不变的,则延拓问题的解渐近表现为质量乘以基本解,但在非双 $K$-不变的情形下这种收敛可能失效。在第二部分中,我们研究与 $G/K$ 上所谓特殊拉普拉斯算子相关联的延拓问题的长时间渐近行为。在这一情形下,我们观察到与欧氏情形下泊松半群类似的现象,例如无需双 $K$-不变假设即可得到 $L^1$ 渐近收敛。

英文摘要:

This work deals with the extension problem for the fractional Laplacian on Riemannian symmetric spaces $G/K$ of noncompact type and of general rank, which gives rise to a family of convolution operators, including the Poisson operator. More precisely, motivated by Euclidean results for the Poisson semigroup, we study the long-time asymptotic behavior of solutions to the extension problem for $L^1$ initial data. In the case of the Laplace-Beltrami operator, we show that if the initial data is bi-$K$-invariant, then the solution to the extension problem behaves asymptotically as the mass times the fundamental solution, but this convergence may break down in the non bi-$K$-invariant case. In the second part, we investigate the long-time asymptotic behavior of the extension problem associated with the so-called distinguished Laplacian on $G/K$. In this case, we observe phenomena which are similar to the Euclidean setting for the Poisson semigroup, such as $L^1$ asymptotic convergence without the assumption of bi-$K$-invariance.

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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