摘要
本文研究了由高斯核构成的拟插值算子在闭区间上的近似逼近问题.利用函数延拓和近似单位分划的方法,构造了拟插值算子,并得到了一致范数下的逼近阶估计.
In this article,we study the approximate approximation for quasi-interpolation operators with Gaussian kernels on a closed interval.By using extension of functions and approxi-mate partition of unity,we construct the operators of quasi-interpolation and obtain the estimates of approximation degree in uniform norm.
出处
《数学杂志》
CSCD
北大核心
2011年第3期401-408,共8页
Journal of Mathematics
基金
Supported by National Natural Science Foundation of China(10871226)
关键词
近似逼近
高斯核
误差估计
连续模
approximate approximation
Gaussian kernels
error estimates
modulus of continuity