Abstract
In this article we extend the ideas presented in Onofrei and Vernescu [Asymptotic Anal. 54 (2007), pp. 103–123] and introduce suitable second-order boundary layer correctors, to study the H 1-norm error estimate for the classical problem of homogenization, i.e. Previous second-order boundary layer results assume either smooth enough coefficients (which is equivalent to assuming smooth enough correctors χ j , χ ij ∈ W 1,∞), or smooth homogenized solution u 0, to obtain an estimate of order . For this we use some ideas related to the periodic unfolding method proposed by Cioranescu et al. [C. R. Acad. Sci. Paris, Ser. I 335 (2002), pp. 99–104]. We prove that in two dimensions, for non-smooth coefficients and general data, one obtains an estimate of order . In three dimensions the same estimate is obtained assuming χ j , χ ij ∈ W 1,p , with p > 3.
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