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Fourier级数部分和对ω-型单调函数的逼近 被引量:7

ON APPROXIMATION OF THE PARTIAL SUMS OF FOURIER SERIES FOR ω-TYPE MONOTONIC FUNCTIONS
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摘要 引入ω-型单调函数的概念,研究了Fourier级数部分和对其的逼近问题,推广了Mazhar(1991)的结果,减弱了Salem和Zygmund(1946)的结果的条件,使Salem和Zygmund的结论适用于更大的函数类. Abstract: The concept of ωtype monotonic function is introduced,and an approximation of the partial sums of Fourier series for ωtype monotonic functions is investigated.Furthermore the results obtained by Mazhar,by Salem and Zygmund are generalized and improved respectively.
作者 俞国华
机构地区 宁波大学数学系
出处 《高校应用数学学报(A辑)》 CSCD 北大核心 2002年第1期51-55,共5页 Applied Mathematics A Journal of Chinese Universities(Ser.A)
基金 宁波大学科研基金(992102G)
关键词 FOURIER级数 部分和 ω-型单调函数 逼近 函数逼近 共轭级数 Fourier Series Partial Sums ω-Type Monotonic Function Approximation
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参考文献1

  • 1S. M. Mazhar,A. Al-Budaiwi. An estimate of the rate of convergence of the conjugate Fourier series of functions of bounded variation[J] 1987,Acta Mathematica Hungarica(3-4):377~380

同被引文献21

  • 1俞国华.Legendre-Fourier级数部分和对有界变差函数的逼近[J].杭州大学学报(自然科学版),1995,22(3):215-221. 被引量:3
  • 2[1]Walter G G. Pointwise convergence of wavelet expansions[J]. J. A. T. , 1995, (80) :108-118
  • 3[2]Walter G G. Approximation of the Delta Function by Wavelets[J] J. A. T. ,1992, (71) :329-343
  • 4[4]Bojanic R. An estimate of the rate of convergence for Fourier series of functions of bounded variation[J]. Pull. Inst. Math.(Beograd) , 1976,(26):57-60
  • 5[5]Salem R,Zygmund A. The approximation by partial sums of Fourier series[J]. Trans. Amer. Math. Soc. , 1946, (59): 14-22
  • 6[6]Salem R.Zymund A.The approximation by partial sums of Founrier series[J].Trans.Amer.Math.Soc.,1946,59:14-22.
  • 7[7]Mazhar S M.Approximation by the patial sums of Fourier series[J].Analysis,1991,11:149-154.
  • 8[8]Bojanic R.An estimate of the rate of convergence for Fourier series of functions of bounded variatin[J].Publ.Inst.Math.(Beograd),1979,26:57-60.
  • 9[9]Mazhar S M,AL-Budaiwi A.An estimate of the rate of convergence of the conjugate Fourier series of functions of bounded variation[J].Acta.Math.Hungar,1987,49:377-380.
  • 10[1]谢庭潘,周颂平.实函数逼近论[M].杭州:杭州大学出版社,1998:102-104.

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