arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1111.2517math.AP
收藏

具有振荡系数的椭圆型方程组Dirichlet特征值的一阶展开

First-order expansion for the Dirichlet eigenvalues of an elliptic system with oscillating coefficients

Christophe Prange

摘要:

本文研究了有界区域$Ω\subset\mathbb R^2$中具有$ε$ -周期系数的向量椭圆算子$-\nabla\cdot A^ε(\cdot)\nabla$的Dirichlet本征值问题的均匀化.我们分析了当$ε\rightarrow 0$,模式$k$固定时特征值$λ^{ε,k}$的渐近性。证明了当$Ω$是光滑一致凸区域或凸多边形区域且斜边满足小因子假设时,$λ^{ε,k}$的一阶渐近展开式.我们的结果推广了Moskow和Vogelius的结果,仅限于标量算子和凸多边形域的有理斜率。我们利用最近的进展,由于Gérard-Varet和Masmoudi在边界层型系统的均匀化。

英文摘要:

This paper is concerned with the homogenization of the Dirichlet eigenvalue problem, posed in a bounded domain $Ω\subset\mathbb R^2$, for a vectorial elliptic operator $-\nabla\cdot A^ε(\cdot)\nabla$ with $ε$-periodic coefficients. We analyse the asymptotics of the eigenvalues $λ^{ε,k}$ when $ε\rightarrow 0$, the mode $k$ being fixed. A first-order asymptotic expansion is proved for $λ^{ε,k}$ in the case when $Ω$ is either a smooth uniformly convex domain, or a convex polygonal domain with sides of slopes satisfying a small divisors assumption. Our results extend those of Moskow and Vogelius restricted to scalar operators and convex polygonal domains with sides of rational slopes. We take advantage of the recent progress due to Gérard-Varet and Masmoudi in the homogenization of boundary layer type systems.

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。

↑