对矩形有限元误差给出了新的定义及性质,此定义不仅对光滑解适用,而且对非光滑解也适用,从而对非光滑问题的收敛及超收敛性分析找到一种新的方法。
A enw kind of error definition solution but also for no-smooth soltion; for rectangular finite element is given, The definition can be used not only for smooth thus we can find a new method of convergence or supconvergence for no-smooth problem.