特征值问题Q_1^(rot)元的展开及外推

Expansion and Extrapolation of The Eigenvalue on Q1rot Element

对pisson方程的特征值采用Q_1^(rot)非协调元进行展开,得出了特征值更近的上界,当选用方行Q_1^(rot)元时得到了整齐的结果,然后在误差展开式的基础上进行外推,把特征值的精度从二阶提高到四阶。

We expand eigenvalue of possion equqtion using Q1rot nonconforming element. By square Q1rot elements the form of the upper bound is simple. We also extrapolate error expansion and enhance the accuracy of the eigenvalue from second order to the fourth order.