Ge, Liang; Yan, Ningning; Wang, Lianhai; Liu, Wenbin; Yang, Danping Heterogeneous multiscale method for optimal control problem governed by elliptic equations with highly oscillatory coefficients. (English) Zbl 1424.49024 J. Comput. Math. 36, No. 5, 644-660 (2018). Summary: In this paper, we investigate the heterogeneous multiscale method (HMM) for the optimal control problem with distributed control constraints governed by elliptic equations with highly oscillatory coefficients. The state variable and co-state variable are approximated by the multiscale discretization scheme that relies on coupled macro and micro finite elements, whereas the control variable is discretized by the piecewise constant. By applying the well-known Lions’ Lemma to the discretized optimal control problem, we obtain the necessary and sufficient optimality conditions. A priori error estimates in both \({L^2}\) and \({H^1}\) norms are derived for the state, co-state and the control variable with uniform bound constants. Finally, numerical examples are presented to illustrate our theoretical results. Cited in 4 Documents MSC: 49K20 Optimality conditions for problems involving partial differential equations 49M25 Discrete approximations in optimal control Keywords:constrained convex optimal control; heterogeneous multiscale finite element; a priori error estimate; elliptic equations with highly oscillatory coefficients PDFBibTeX XMLCite \textit{L. Ge} et al., J. Comput. Math. 36, No. 5, 644--660 (2018; Zbl 1424.49024) Full Text: DOI