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

Article type: Research Article

Authors: Prange, Christophe

Affiliations: Institut de Mathématiques de Jussieu, 175 rue du Chevaleret, 75013 Paris, France. E-mail: prange@math.jussieu.fr

Abstract: This paper is concerned with the homogenization of the Dirichlet eigenvalue problem, posed in a bounded domain Ω⊂R2, for a vectorial elliptic operator −∇·Aε(·)∇ with ε-periodic coefficients. We analyse the asymptotics of the eigenvalues λε,k when ε→0, the mode k being fixed. A first-order asymptotic expansion is proved for λε,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 in Proc. Roy. Soc. Edinburgh Sect. A 127(6) (1997), 1263–1299 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 [J. Eur. Math. Soc. 13 (2011), 1477–1503; Acta Math. 209 (2012), 133–178] in the homogenization of boundary layer type systems.

Keywords: homogenization, boundary layers, elliptic systems, regularity estimates in irregular domains, low frequency waves

DOI: 10.3233/ASY-121158

Journal: Asymptotic Analysis, vol. 83, no. 3, pp. 207-235, 2013