引用本文:

谢敦礼. 富里埃级数的norlund平均逼近的阶[J]. 浙江大学学报（理学版）, .

xie dunli. degree of approximation by norlund’s means of fourier series. Journal of Zhejiang University (Science Edition), .

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https://www.zjujournals.com/sci/CN/    或    https://www.zjujournals.com/sci/CN/Y1982/V9/I4/399