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Approximation by Norlund Means of Hexagonal Fourier Series
【机 构】
：
DepartmentofMathematics
【出 处】
：
分析理论与应用：英文刊
【发表日期】
：
2017年4期
【基金项目】
：
This research was supported by Balikesir University. Grant Number： 2014/49.
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