Abstract
An elliptic fourth-order differential operator \(A_\varepsilon\) on \(L_2(\mathbb{R}^d;\mathbb{C}^n)\) is studied. Here \(\varepsilon >0\) is a small parameter. It is assumed that the operator is given in the factorized form \(A_\varepsilon = b(\mathbf{D})^* g(\mathbf{x}/\varepsilon) b(\mathbf{D})\), where \(g(\mathbf{x})\) is a Hermitian matrix-valued function periodic with respect to some lattice and \(b(\mathbf{D})\) is a matrix second-order differential operator. We make assumptions ensuring that the operator \(A_\varepsilon\) is strongly elliptic. The following approximation for the resolvent \((A_\varepsilon + I)^{-1}\) in the operator norm of \(L_2(\mathbb{R}^d;\mathbb{C}^n)\) is obtained:
Here \(A^0\) is the effective operator with constant coefficients and \(K_{1}\) and \(K_{2}(\varepsilon)\) are certain correctors.
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Notes
Added in proof. The authors have learned that such an estimate was independently obtained by S. E. Pastukhova with the use of the shift method (S. E. Pastukhova, \(L^2\)-approximation of the resolvent in homogenization of elliptic higher-order operators, to appear in Sb. Math.).
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Funding
This work was supported by the Russian Science Foundation, project no. 17-11-01069.
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Translated from Funktsional'nyi Analiz i Ego Prilozheniya, 2020, Vol. 54, No. 3, pp. 94-99 https://doi.org/10.4213/faa3807 .
Translated by T. A. Suslina
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Sloushch, V.A., Suslina, T.A. Homogenization of the Fourth-Order Elliptic Operator with Periodic Coefficients with Correctors Taken into Account. Funct Anal Its Appl 54, 224–228 (2020). https://doi.org/10.1134/S0016266320030077
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DOI: https://doi.org/10.1134/S0016266320030077