High accuracy analysis of nonconforming MFEM for constrained optimal control problems governed by Stokes equations

Abstract In this paper, we propose a stable nonconforming mixed finite element method (MFEM) for the constrained optimal control problems (OCPs) governed by Stokes equations, in which the E Q 1 r o t -constant scheme just satisfies the discrete inf–sup condition. The superclose and superconvergence results are obtained.