Publisher： Cambridge University Press
E-ISSN： 2075-1354|4|6|751-768
ISSN： 2070-0733
Source： Advances in Applied Mathematics and Mechanics, Vol.4, Iss.6, 2012-12, pp. : 751-768
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Abstract
In this paper, we investigate the error estimates and superconvergence property of mixed finite element methods for elliptic optimal control problems. The state and co-state are approximated by the lowest order Raviart-Thomas mixed finite element spaces and the control variable is approximated by piecewise constant functions. We derive
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