讨论了二阶椭圆问题的一个新的非协调混合元模型,在不需要验证BB条件的情况下,给出了其收敛性分析,得到了与协调元情形相同的最优误差估计.
A new nonconforming mixed finite element model for the second-order elliptic problem is discussed. The convergence analysis is presented, and the same optimal error estimates are derived as the conforming element methods without verifying the BB condition.