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arXiv 1409.5271math.AP
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具有随机周期系数的椭圆型方程组的校正估计

Corrector estimates for elliptic systems with random periodic coefficients

Peter Bella, Felix Otto

摘要:

我们考虑一个椭圆方程组的环面$\left[ -\frac{L}{2}, \frac{L}{2} \right)^d$与随机系数$A$,这被假定为强制和固定。使用两种不同的方法,我们得到的修正梯度的矩界,独立的域大小$L$。在第一种方法中,我们使用格林函数表示。为此,我们要求$A$是局部Hölder连续的,并且要求$A$的分布满足对数Sobolev不等式.第二种方法适用于非平滑(可能不连续)系数,并且它要求$A$的统计满足谱间隙估计。

英文摘要:

We consider an elliptic system of equations on the torus $\left[ -\frac{L}{2}, \frac{L}{2} \right)^d$ with random coefficients $A$, that are assumed to be coercive and stationary. Using two different approaches we obtain moment bounds on the gradient of the corrector, independent of the domain size $L$. In the first approach we use Green function representation. For that we require $A$ to be locally Hölder continuous and distribution of $A$ to satisfy Logarithmic Sobolev inequality. The second method works for non-smooth (possibly discontinuous) coefficients, and it requires that statistics of $A$ satisfies Spectral Gap estimate.

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