摘要
利用Hardy-Littlewood极大函数、加权连续模、N函数的凸性和不等式等技巧,在Orlicz空间内利用修正的Bak算子,研究了光滑函数的加权Müntz有理逼近的逼近速度,并进一步考虑了变化后的加权Müntz系统内的有理函数对光滑函数的逼近问题,其逼近速度优于通常的Müntz有理函数的逼近.
In this paper,the hardy-littlewood maximal function,the weighted modulus of continuity,the convex of function,and the skills of inequality was applied to study the approximation rate of weighted Müntz rational approximation of smooth funtion in weighted Orlicz space.Furthermore,and the approximation of the rational function in the change system was considered,and concluding that approximation speed was better than the approximation of normal Müntz rational function.
引文
[1] 唐秀娟,刘庆和.Müntz有理逼近的点态估计 [J].宝鸡文理学院学报:自然科学版,2006,27(2):184-186.
[2] 吴从炘,王廷铺.奥尔里奇空间及其应用 [M].哈尔滨:黑龙江科学技术出版社,1983:44-45.
[3] 康正华.B a空间中若干逼近问题的研究 [D].呼和浩特:内蒙古师范大学数学科学学院,2009:37-44.
[4] 于蕊芳.Orlicz空间内有关逼近问题的研究 [D].呼和浩特:内蒙古师范大学数学科学学院,2016:25-31.
[5] 谢敦礼.连续正算子L*M逼近的阶 [J].杭州大学学报:自然科学版,1981,8(2):142-146.