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We study the superconvergence of the stable lowest equal-order finite element pair solving the Stokes problem. The superclose property is proved for the interpolation function; then a superconvergence rate of $$O(h^{\frac{3}{2}})$$ O ( h 3 2 ) -order is obtained for the velocity gradient approximation by using the post-processing technique, and an $$O(h^{\frac{3}{2}})$$ O ( h...
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