The approximation of the rotated Q1-element to a class of second order elliptic problems is studied and the superconvergence result is obtained on anisotropic meshes.

• 摘要研究了在各向异性网格下具有约束条件的旋转Q1元对二阶椭圆问题的有限元逼近并给出了其超收敛性分析。