任意三角形单元上的二次Lagrange型插值逼近

2-Degree Lagrange's Interpolation Approximationfor Any Triangular Element

文献［２］研究了三角形单元上一次Ｌａｇｒａｎｇｅ型插值多项式，并得出了相应的误差估计。本文对任意三角形单元上的二次Ｌａｇｒａｎｇｅ插值多项式进行了研究，也取得了类似的结果。

Degree Lagrange's interpolation for triangular element was studied in paper . In this paper, 2-degree Lagrange's interpolation for triangular element has been studied, and the error estimates have been given. In fact, it is just the genealization of 1-degree Lagrange's interpolation.