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arXiv 0903.5085math.PRmath.AP
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一类相互作用Bessel过程系统的正则性

Regularity Properties for a System of Interacting Bessel Processes

Sebastian Andres, Max-K. von Renesse

摘要:

本文研究了具有奇异漂移和反射边界条件的单形上扩散的正则性,该单形描述了一个具有库仑相互作用和最近邻之间反射的有限粒子系统。作为我们的主要结果,我们建立了Feller性质的过程中的排斥和吸引的情况下。特别地,系统可以从任何初态启动,包括重点配置。证明了该过程是欧氏半鞅当且仅当相互作用是排斥的。因此,相反的经典结果反映布朗运动在光滑域中,在吸引政权的建设通过一个系统的Skorokhod SDES是不可能的。最后,我们建立指数热核梯度估计的排斥制度。吸引情形的主要证明是基于带Muckenhoupt权的Sobolev空间中的位势论。

英文摘要:

We study the regularity of a diffusion on a simplex with singular drift and reflecting boundary condition which describes a finite system of particles on an interval with Coulomb interaction and reflection between nearest neighbors. As our main result we establish the Feller property for the process in both cases of repulsion and attraction. In particular the system can be started from any initial state, including multiple point configurations. Moreover we show that the process is a Euclidean semi-martingale if and only if the interaction is repulsive. Hence, contrary to classical results about reflecting Brownian motion in smooth domains, in the attractive regime a construction via a system of Skorokhod SDEs is impossible. Finally, we establish exponential heat kernel gradient estimates in the repulsive regime. The main proof for the attractive case is based on potential theory in Sobolev spaceswith Muckenhoupt weights.

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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