作者研究了定义在全实轴上的Sobolev函数类Wp^1(R)的逼近问题.以一次样条函数作为逼近工具,给出了P=1和p=∞时的逼近误差.
The approximation problem in Sobolev classes Wp^1(R) defined on the real line was studied. The approximation tool is the polynomial spline of degree 1 with notes { k/n }kez. The approximation error was studied when p = 1 and p = ∞.