【摘要】 在各向异性网格下,讨论了两类非协调矩形元对二阶椭圆边值问题的某些超逼近性和超收敛性,并证明了在单元中心点这种超收敛性仅为一种点态现象.数值结果验证了我们理论分析的正确性.更多还原

【Abstract】 The superclose and superconvergence of two nonconforming rectangular elements’ap- proximations to a class of second order elliptic problems are discussed on anisotropic meshes. It is also proved that the above supercovergence at the central point of the element is only pointwise phenomenon.Numerical results are presented to verify our theoretical analysis.更多还原