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arXiv 1507.04861math.AP
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离散分数阶经典Fokker-Planck方程的一致半群谱分析

Uniform semigroup spectral analysis of the discrete, fractional \& classical Fokker-Planck equations

Stéphane Mischler, Isabelle Tristani

摘要:

本文从半群的观点研究了离散、分数阶和经典Fokker-Planck方程的谱分析。离散和分数阶Fokker-Planck方程在某种意义上收敛于经典方程。因此,我们首先处理离散和经典的Fokker-Planck方程在同一个框架,证明统一的谱估计使用微扰参数和放大参数。然后,我们对分数阶和经典的Fokker-Planck方程做了类似的分析,使用了一个扩大半群衰变空间的论点。我们还处理了另一类离散的Fokker-Planck方程,它收敛到分数阶Fokker-Planck方程,我们也能够从谱分析的观点在同一个框架下处理这些方程,仍然是一个半群的方法,并感谢微扰的论点结合扩大之一。让我们在这里强调,我们改进了在[7]中引入并在[11]中发展的微扰论证,放松了定理的假设,从而扩大了满足应用它所需假设的算子类。

英文摘要:

In this paper, we investigate the spectral analysis (from the point of view of semi-groups) of discrete, fractional and classical Fokker-Planck equations. Discrete and fractional Fokker-Planck equations converge in some sense to the classical one. As a consequence, we first deal with discrete and classical Fokker-Planck equations in a same framework, proving uniform spectral estimates using a perturbation argument and an enlargement argument. Then, we do a similar analysis for fractional and classical Fokker-Planck equations using an argument of enlargement of the space in which the semigroup decays. We also handle another class of discrete Fokker-Planck equations which converge to the fractional Fokker-Planck one, we are also able to treat these equations in a same framework from the spectral analysis viewpoint, still with a semigroup approach and thanks to a perturbative argument combined with an enlargement one. Let us emphasize here that we improve the perturbative argument introduced in [7] and developed in [11], relaxing the hypothesis of the theorem, enlarging thus the class of operators which fulfills the assumptions required to apply it.

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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