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arXiv 1602.00592math.AP
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相互作用细丝的平均场极限与向量值非线性偏微分方程

Mean field limit of interacting filaments and vector valued non linear PDEs

Hakima Bessaih, Michele Coghi, Franco Flandoli

摘要:

家庭的$N$相互作用曲线被认为是长程,平均场型,相互作用。一系列曲线定义了一个1-电流,集中在曲线上,模拟了相互作用点粒子的经验测量。证明了当$N$趋于无穷大时,该电流收敛于平均场电流,即非线性向量值偏微分方程的解。在极限情况下,每条曲线都与平均场电流相互作用,如果两条不同的曲线在零时刻独立,则它们具有独立性。这种设置的灵感来自于湍流流体中的涡丝,尽管由于技术原因,我们必须限制到光滑的相互作用,而不是奇异的Biot-Savart内核。所有这些结果都是基于对1-电流的非线性流动方程的仔细分析,它与向量值PDE的关系以及对初始条件的连续依赖性。

英文摘要:

Families of $N$ interacting curves are considered, with long range, mean field type, interaction. A family of curves defines a 1-current, concentrated on the curves, analog of the empirical measure of interacting point particles. This current is proved to converge, as $N$ goes to infinity, to a mean field current, solution of a nonlinear, vector valued, partial differential equation. In the limit, each curve interacts with the mean field current and two different curves have an independence property if they are independent at time zero. This set-up is inspired from vortex filaments in turbulent fluids, although for technical reasons we have to restrict to smooth interaction, instead of the singular Biot-Savart kernel. All these results are based on a careful analysis of a nonlinear flow equation for 1-currents, its relation with the vector valued PDE and the continuous dependence on the initial conditions.

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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