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arXiv 2302.02624math.AP
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双曲空间上非局部耗散对流-扩散核的集中极限

Concentration limit for non-local dissipative convection-diffusion kernels on the hyperbolic space

María del Mar González, Liviu I. Ignat, Dragoş Manea, Sergiu Moroianu

AI总结:

本文研究双曲空间上非局部输运与对流-扩散方程在核集中时的极限行为,证明解收敛到局部方程,并构造满足条件的核类及流形紧性工具。

摘要:

我们研究双曲空间 $\mathbb{H}^N$ 上的一个非局部演化方程。首先考虑一个由定义在切丛上且在测地流下不变的非局部相互作用核所支配的粒子输运模型。当核在每个切空间原点附近集中时,我们研究该模型到局部输运问题的松弛极限。在核满足一定的正则性与可积性条件下,我们证明重新标度后的非局部问题的解收敛到局部输运方程的解。然后,我们构造一大类满足这些条件的相互作用核。我们还考虑 $\mathbb{H}^N$ 上由两个核(分别对应扩散部分和对流部分)支配的非局部非线性对流-扩散方程,并证明当核集中时,其解收敛到局部问题的解。我们证明并在此意义下使用了一个受 Bourgain-Brezis-Mironescu 工作启发的流形上的紧性工具。

英文摘要:

We study a non-local evolution equation on the hyperbolic space $\mathbb{H}^N$. We first consider a model for particle transport governed by a non-local interaction kernel defined on the tangent bundle and invariant under the geodesic flow. We study the relaxation limit of this model to a local transport problem, as the kernel gets concentrated near the origin of each tangent space. Under some regularity and integrability conditions on the kernel, we prove that the solution of the rescaled non-local problem converges to that of the local transport equation. Then, we construct a large class of interaction kernels that satisfy those conditions. We also consider a non-local, non-linear convection-diffusion equation on $\mathbb{H}^N$ governed by two kernels, one for each of the diffusion and convection parts, and we prove that the solution converges to the solution of a local problem as the kernels get concentrated. We prove and then use in this sense a compactness tool on manifolds inspired by the work of Bourgain-Brezis-Mironescu.

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