A Superconvergence result for mixed finite element approximations of the eigenvalue problem
Qun Lin, Hehu Xie (2012)
ESAIM: Mathematical Modelling and Numerical Analysis
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In this paper, we present a superconvergence result for the mixed finite element approximations of general second order elliptic eigenvalue problems. It is known that a superconvergence result has been given by Durán [ (1999) 1165–1178] and Gardini [ (2009) 853–865] for the lowest order Raviart-Thomas approximation of Laplace eigenvalue problems. In this work, we introduce a new way to derive the superconvergence of general second order elliptic eigenvalue...