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arXiv 0809.1545math.PRmath-phmath.MP
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一类一维动力学方程的中心极限定理

Central limit theorem for a class of one-dimensional kinetic equations

Federico Bassetti, Lucia Ladelli, Daniel Matthes

摘要:

我们介绍了一类Boltzmann方程的实数线,这构成了经典的卡茨漫画的扩展。碰撞增益算子由具有一般性质的光滑变换定义。通过建立与中心极限问题的联系,我们能够证明方程的解朝着极限分布的长时间收敛。如果玻尔兹曼方程的初始条件属于某个稳定律$g_α$的正常吸引域,则极限是非平凡的,并且是$g_α$的膨胀的统计混合。在一些额外的假设下,Wasserstein度量的平衡显式指数率的计算,并显示强收敛的概率密度。

英文摘要:

We introduce a class of Boltzmann equations on the real line, which constitute extensions of the classical Kac caricature. The collisional gain operators are defined by smoothing transformations with quite general properties. By establishing a connection to the central limit problem, we are able to prove long-time convergence of the equation's solutions towards a limit distribution. If the initial condition for the Boltzmann equation belongs to the domain of normal attraction of a certain stable law $g_α$, then the limit is non-trivial and is a statistical mixture of dilations of $g_α$. Under some additional assumptions, explicit exponential rates for the equilibration in Wasserstein metrics are calculated, and strong convergence of the probability densities is shown.

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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