On Gibbs-Wilbraham Phenomenon and the Arclength of Fourier Series

On Gibbs-Wilbraham Phenomenon and the Arclength of Fourier Series
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DOI:
10.1007/s00041-010-9135-4
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发表时间:
2011-08
影响因子:
1.2
通讯作者:
Kazuki Dempo;S. Kuratsubo
Kazuki Dempo;S. Kuratsubo
中科院分区:
数学3区
文献类型:
--
作者:
Kazuki Dempo;S. Kuratsubo

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具有跳跃间断的分段C1函数f的Fourier级数的部分和SN(f)的图Γ(SN(f))的弧长渐近等于$(\hbox{f$的所有跳跃之和})\* LN},其中LN是Lebesgue常数.这是R. J. Fourier Anal. 6,533-536,2000)。
The arclength of the graphs Γ(SN(f)) of the partial sumsSN(f) of the Fourier series of a piecewiseC1functionfwith jump discontinuities is equal asymptotically to $(\hbox{the sum of all jumps of $f$})\times L_{N}$, whereLNis the Lebesgue constant. This is an improvement of R. Strichartz (J. Fourier Anal. Appl. 6, 533–536, 2000).