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Weyl integral : ウィキペディア英語版
Weyl integral

In mathematics, the Weyl integral is an operator defined, as an example of fractional calculus, on functions ''f'' on the unit circle having integral 0 and a Fourier series. In other words there is a Fourier series for ''f'' of the form
: \sum_^ a_n e^
with ''a''0 = 0.
Then the Weyl integral operator of order ''s'' is defined on Fourier series by
: \sum_^ (in)^s a_n e^
where this is defined. Here ''s'' can take any real value, and for integer values ''k'' of ''s'' the series expansion is the expected ''k''-th derivative, if ''k'' > 0, or (−''k'')th indefinite integral normalized by integration from ''θ'' = 0.
The condition ''a''0 = 0 here plays the obvious role of excluding the need to consider division by zero. The definition is due to Hermann Weyl (1917).
==See also==

*Sobolev space

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
ウィキペディアで「Weyl integral」の詳細全文を読む



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