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arXiv 1003.2074math.PR
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平面随机曲线缩短流的遍历性

Ergodicity of Stochastic Curve Shortening Flow in the Plane

A. Es-Sarhir, M. -K. von Renesse

摘要:

研究了二维布朗速度场中(1+1)维界面的中曲率运动模型。对于模型的适定性,我们在Krylov Rozovskii变分框架下证明了退化非线性随机发展方程解的存在唯一性,用一个Lyapunov型条件取代了标准的非线性假设.利用Komorowski,Peszat和Szarek关于马尔可夫半群的下界技术,建立了加性噪声情形下的遍历性

英文摘要:

We study a model of the motion by mean curvature of an (1+1) dimensional interface in a 2D Brownian velocity field. For the well-posedness of the model we prove existence and uniqueness for certain degenerate nonlinear stochastic evolution equations in the variational framework of Krylov Rozovskii, replacing the standard coercivity assumption by a Lyapunov type condition. Ergodicity is established for the case of additive noise, using the lower bound technique for Markov semigroups by Komorowski, Peszat and Szarek

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