H^1(R)空间一个残差投影展开公式

Residua projection expansion formula in H^1(R)

给出了Ｈ１（Ｒ）空间中一个残差投影展开公式．推出了基函数的表达式，并给出相应的定理 此种残差投影展开公式可以避免内积运算中的积分计算，只是节点集｛２‘ｋ｝上的插值计算，算法简便易行。

Presents the expansion formula in H1 (R) given by using residua projection to change inner product into interpolation on the discrete point set {2jk} so that the expansion of the fuctions in computation is simple and feasible, and points out that it is a good tool for approximation of the functions.