arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1707.08992math.APmath.PR
收藏

均匀化的定性与定量理论简介

An introduction to the qualitative and quantitative theory of homogenization

Stefan Neukamm

摘要:

介绍了椭圆型偏微分方程的周期均匀化和随机均匀化.第一部分是关于定性理论,我们提出了一个统一的方法的基础上振荡检验函数的方法与周期和随机系数的方程。特别地,我们为构造随机均匀化的次线性校正子提供了一个完备的和基本的论证。(The这也适用于椭圆系统,特别是线性弹性)。在第二部分中,我们简要地讨论了均匀化误差的双尺度展开表示。在最后一部分中,我们讨论了离散情形下定量随机均匀化的一些结果。特别地,我们讨论了通过浓度不等式的遍历性的量化,并且我们说明了后者与椭圆正则性理论相结合导致了次线性校正器的增长和均匀化误差的量化。

英文摘要:

We present an introduction to periodic and stochastic homogenization of ellip- tic partial differential equations. The first part is concerned with the qualitative theory, which we present for equations with periodic and random coefficients in a unified approach based on Tartar's method of oscillating test functions. In partic- ular, we present a self-contained and elementary argument for the construction of the sublinear corrector of stochastic homogenization. (The argument also applies to elliptic systems and in particular to linear elasticity). In the second part we briefly discuss the representation of the homogenization error by means of a two- scale expansion. In the last part we discuss some results of quantitative stochastic homogenization in a discrete setting. In particular, we discuss the quantification of ergodicity via concentration inequalities, and we illustrate that the latter in combi- nation with elliptic regularity theory leads to a quantification of the growth of the sublinear corrector and the homogenization error.

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。

↑