"클라우센 함수(Clausen function)"의 두 판 사이의 차이

수학노트
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1번째 줄: 1번째 줄:
<h5 style="line-height: 3.428em; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic', dotum, gulim, sans-serif; font-size: 1.166em; background-image: ; background-color: initial; background-position: 0px 100%;">이 항목의 스프링노트 원문주소</h5>
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<h5 style="line-height: 3.428em; margin: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">이 항목의 스프링노트 원문주소</h5>
  
 
* [[클라우센 함수(Clausen function)]]<br>
 
* [[클라우센 함수(Clausen function)]]<br>
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<h5 style="line-height: 3.428em; margin: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">개요</h5>
  
 
*  정의<br><math>\operatorname{Cl}_2(\theta)=-\int_0^{\theta} \ln |2\sin \frac{t}{2}| \,dt=\sum_{n=1}^{\infty}\frac{\sin (n\theta)}{n^2}</math><br>
 
*  정의<br><math>\operatorname{Cl}_2(\theta)=-\int_0^{\theta} \ln |2\sin \frac{t}{2}| \,dt=\sum_{n=1}^{\infty}\frac{\sin (n\theta)}{n^2}</math><br>
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<h5 style="line-height: 2em; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic', dotum, gulim, sans-serif; font-size: 1.166em; background-image: ; background-color: initial; background-position: 0px 100%;">dilogarithm 함수와의 관계</h5>
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<h5 style="line-height: 2em; margin: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">dilogarithm 함수와의 관계</h5>
  
* [[다이로그 함수(dilogarithm)|dilogarithm 함수]]는 복소수 <math>|z|<1</math>에 대하여 다음과 같이 정의됨
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* [[#]]
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* 는 복소수 <math>|z|<1</math>에 대하여 다음과 같이 정의됨
 
* <math>\operatorname{Li}_2(z)= \sum_{n=1}^\infty {z^n \over n^2}</math><br><math>|z|\leq 1</math> 에서 고르게 수렴하는 급수이므로, <math>|z|\leq 1</math>에서 연속<br>
 
* <math>\operatorname{Li}_2(z)= \sum_{n=1}^\infty {z^n \over n^2}</math><br><math>|z|\leq 1</math> 에서 고르게 수렴하는 급수이므로, <math>|z|\leq 1</math>에서 연속<br>
* <math>z=e^{i\theta}</math>, <math>0 \leq \theta \leq 2\pi</math> 일때<br><math>\operatorname{Li}_2(e^{i\theta})= \sum_{n=1}^\infty \frac{e^{in\theta}}{n^2}=\sum_{n=1}^\infty \frac{\cos n\theta}{n^2}+i\sum_{n=1}^\infty \frac{\sin n\theta}{n^2}</math><br><math>\mathfrak{I}(\operatorname{Li}_2(e^{i\theta}))=\sum_{n=1}^\infty \frac{\sin n\theta}{n^2}=Cl_2(\theta)</math><br>
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*  <br><math>z=e^{i\theta}</math>, <math>0 \leq \theta \leq 2\pi</math> 일때<br><math>\operatorname{Li}_2(e^{i\theta})= \sum_{n=1}^\infty \frac{e^{in\theta}}{n^2}=\sum_{n=1}^\infty \frac{\cos n\theta}{n^2}+i\sum_{n=1}^\infty \frac{\sin n\theta}{n^2}</math><br><math>\mathfrak{I}(\operatorname{Li}_2(e^{i\theta}))=\sum_{n=1}^\infty \frac{\sin n\theta}{n^2}=Cl_2(\theta)</math>[[블로흐-비그너 다이로그(Bloch-Wigner dilogarithm)|]]<br>
* [[블로흐-비그너 다이로그(Bloch-Wigner dilogarithm)|Bloch-Wigner dilogarithm]]<br>
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* [[블로흐-비그너 다이로그(Bloch-Wigner dilogarithm)]]<br>
  
 
 
 
 
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<math>\Lambda(n\theta)=n\sum_{k=0}^{n-1}\Lambda(\theta+\frac{2k\pi}{n})</math>
 
<math>\Lambda(n\theta)=n\sum_{k=0}^{n-1}\Lambda(\theta+\frac{2k\pi}{n})</math>
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<h5 style="line-height: 2em; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic', dotum, gulim, sans-serif; font-size: 1.166em; background-image: ; background-color: initial; background-position: 0px 100%;">트리감마 함수와 special values</h5>
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<h5 style="line-height: 2em; margin: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">트리감마 함수와 special values</h5>
  
 
* <math>\theta=p\pi/q</math>일 때, (<math>p,q\in\mathbb{N}</math>, <math>p=1,2,\cdots,2q-1</math>)<br><math>\operatorname{Cl}_2(\frac{p\pi}{q})=\frac{1}{4q^2}\sum_{r=1}^{2q-1}\psi^{(1)}(\frac{r}{2q})\sin\frac{rp\pi}{q}</math><br> 여기서 <math>\psi^{(1)}</math>는 [[트리감마 함수(trigamma function)]]<br>
 
* <math>\theta=p\pi/q</math>일 때, (<math>p,q\in\mathbb{N}</math>, <math>p=1,2,\cdots,2q-1</math>)<br><math>\operatorname{Cl}_2(\frac{p\pi}{q})=\frac{1}{4q^2}\sum_{r=1}^{2q-1}\psi^{(1)}(\frac{r}{2q})\sin\frac{rp\pi}{q}</math><br> 여기서 <math>\psi^{(1)}</math>는 [[트리감마 함수(trigamma function)]]<br>
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<h5 style="line-height: 3.428em; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic', dotum, gulim, sans-serif; font-size: 1.166em; background-image: ; background-color: initial; background-position: 0px 100%;">재미있는 사실</h5>
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<math>\int_{0}^{\pi/3}\operatorname{Cl}_2(x)\,dx=\frac{2}{3}\zeta(3)</math>
 
<math>\int_{0}^{\pi/3}\operatorname{Cl}_2(x)\,dx=\frac{2}{3}\zeta(3)</math>
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<h5 style="line-height: 3.428em; margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic', dotum, gulim, sans-serif; font-size: 1.166em; background-image: ; background-color: initial; background-position: 0px 100%;">관련된 항목들</h5>
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* [[트리감마 함수(trigamma function)]]<br>
 
* [[트리감마 함수(trigamma function)]]<br>
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* 단어사전 http://www.google.com/dictionary?langpair=en|ko&q=
 
* 단어사전 http://www.google.com/dictionary?langpair=en|ko&q=
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<h5 style="line-height: 3.428em; margin: 0px; color: rgb(34, 61, 103); font-family: 'malgun gothic',dotum,gulim,sans-serif; font-size: 1.166em; background-position: 0px 100%;">사전 형태의 자료</h5>
  
 
* http://ko.wikipedia.org/wiki/
 
* http://ko.wikipedia.org/wiki/
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* http://www.wolframalpha.com/input/?i=
 
* http://www.wolframalpha.com/input/?i=
 
* [http://dlmf.nist.gov/ NIST Digital Library of Mathematical Functions]
 
* [http://dlmf.nist.gov/ NIST Digital Library of Mathematical Functions]
* [http://www.research.att.com/~njas/sequences/index.html The On-Line Encyclopedia of Integer Sequences]<br>
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* [http://www.research.att.com/%7Enjas/sequences/index.html The On-Line Encyclopedia of Integer Sequences]<br>
 
** http://www.research.att.com/~njas/sequences/?q=
 
** http://www.research.att.com/~njas/sequences/?q=
  
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* [http://link.aip.org/link/?JMAPAQ/50/023515/1 A dilogarithmic integral arising in quantum field theory]<br>
 
* [http://link.aip.org/link/?JMAPAQ/50/023515/1 A dilogarithmic integral arising in quantum field theory]<br>
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* [http://link.aip.org/link/?JMAPAQ/49/093508/1 Evaluation of a ln tan integral arising in quantum field theory]<br>
 
* [http://link.aip.org/link/?JMAPAQ/49/093508/1 Evaluation of a ln tan integral arising in quantum field theory]<br>
 
** Mark W. Coffey, J. Math. Phys. 49, 093508 (2008); doi:10.1063/1.2981311
 
** Mark W. Coffey, J. Math. Phys. 49, 093508 (2008); doi:10.1063/1.2981311
* [http://www.sciencedirect.com/science?_ob=MathURL&_method=retrieve&_udi=B6TYH-4FM01DY-1&_mathId=mml206&_user=4420&_cdi=5619&_pii=S0377042705000154&_rdoc=1&_issn=03770427&_acct=C000059607&_version=1&_userid=4420&md5=6b9447739891f5d15aa022b55b859ef5 ][http://dx.doi.org/10.1016/0377-0427(84)90008-6 Formulae concerning the computation of the Clausen integral Cl2(θ)]<br>
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* [http://www.sciencedirect.com/science?_ob=MathURL&_method=retrieve&_udi=B6TYH-4FM01DY-1&_mathId=mml206&_user=4420&_cdi=5619&_pii=S0377042705000154&_rdoc=1&_issn=03770427&_acct=C000059607&_version=1&_userid=4420&md5=6b9447739891f5d15aa022b55b859ef5 ][http://dx.doi.org/10.1016/0377-0427%2884%2990008-6 Formulae concerning the computation of the Clausen integral Cl2(θ)]<br>
 
** C.C. Grosjean, <em style="line-height: 2em;">J. Comput. Appl. Math.</em> '''11''' (1984), pp. 331–342
 
** C.C. Grosjean, <em style="line-height: 2em;">J. Comput. Appl. Math.</em> '''11''' (1984), pp. 331–342
 
* [http://dx.doi.org/10.1016/0377-0427%2884%2990007-4 On the Clausen integral Cl2(Θ) and a related integral]<br>
 
* [http://dx.doi.org/10.1016/0377-0427%2884%2990007-4 On the Clausen integral Cl2(Θ) and a related integral]<br>
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*  도서내검색<br>
 
*  도서내검색<br>
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*  네이버 뉴스 검색 (키워드 수정)<br>
 
*  네이버 뉴스 검색 (키워드 수정)<br>
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*  구글 블로그 검색<br>
 
*  구글 블로그 검색<br>

2012년 6월 1일 (금) 11:01 판

이 항목의 스프링노트 원문주소

 

 

개요
  • 정의
    \(\operatorname{Cl}_2(\theta)=-\int_0^{\theta} \ln |2\sin \frac{t}{2}| \,dt=\sum_{n=1}^{\infty}\frac{\sin (n\theta)}{n^2}\)

 

 

 

dilogarithm 함수와의 관계
  • #
  • 는 복소수 \(|z|<1\)에 대하여 다음과 같이 정의됨
  • \(\operatorname{Li}_2(z)= \sum_{n=1}^\infty {z^n \over n^2}\)
    \(|z|\leq 1\) 에서 고르게 수렴하는 급수이므로, \(|z|\leq 1\)에서 연속
  •  
    \(z=e^{i\theta}\), \(0 \leq \theta \leq 2\pi\) 일때
    \(\operatorname{Li}_2(e^{i\theta})= \sum_{n=1}^\infty \frac{e^{in\theta}}{n^2}=\sum_{n=1}^\infty \frac{\cos n\theta}{n^2}+i\sum_{n=1}^\infty \frac{\sin n\theta}{n^2}\)
    \(\mathfrak{I}(\operatorname{Li}_2(e^{i\theta}))=\sum_{n=1}^\infty \frac{\sin n\theta}{n^2}=Cl_2(\theta)\)[[블로흐-비그너 다이로그(Bloch-Wigner dilogarithm)|]]
  • 블로흐-비그너 다이로그(Bloch-Wigner dilogarithm)

 

 

덧셈공식

\(\Lambda(n\theta)=n\sum_{k=0}^{n-1}\Lambda(\theta+\frac{2k\pi}{n})\)

 

 

트리감마 함수와 special values

 

 

재미있는 사실

 

 

 

역사

 

 

 

메모

\(\int_{0}^{\pi/3}\operatorname{Cl}_2(x)\,dx=\frac{2}{3}\zeta(3)\)

 

관련된 항목들

 

 

수학용어번역

 

 

사전 형태의 자료

 

 

관련논문

 

 

관련도서

 

 

관련기사

 

 

블로그