"Braid group"의 두 판 사이의 차이

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imported>Pythagoras0
32번째 줄: 32번째 줄:
  
 
 
 
 
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==computational resource==
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* https://docs.google.com/file/d/0B8XXo8Tve1cxZ3NjMGpGUWI0QkE/edit
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47번째 줄: 50번째 줄:
  
 
* http://en.wikipedia.org/wiki/Braid_group
 
* http://en.wikipedia.org/wiki/Braid_group
* http://en.wikipedia.org/wiki/
 
* http://www.scholarpedia.org/
 
* http://www.proofwiki.org/wiki/
 
 
 
 
 
 
 
 
 
==books==
 
 
 
 
 
* [[2010년 books and articles]]<br>
 
* http://gigapedia.info/1/
 
* http://gigapedia.info/1/
 
* http://www.amazon.com/s/ref=nb_ss_gw?url=search-alias%3Dstripbooks&field-keywords=
 
 
 
 
 
 
 
 
 
 
==articles==
 
 
 
 
 
* http://www.ams.org/mathscinet
 
* [http://www.zentralblatt-math.org/zmath/en/ ]http://www.zentralblatt-math.org/zmath/en/
 
* http://arxiv.org/
 
* http://www.pdf-search.org/
 
* http://pythagoras0.springnote.com/
 
* [http://math.berkeley.edu/%7Ereb/papers/index.html http://math.berkeley.edu/~reb/papers/index.html]
 
* http://dx.doi.org/
 
 
 
 
 
 
 
 
==question and answers(Math Overflow)==
 
 
* http://mathoverflow.net/search?q=
 
* http://mathoverflow.net/search?q=
 
 
 
 
 
 
 
 
==blogs==
 
 
*  구글 블로그 검색<br>
 
**  http://blogsearch.google.com/blogsearch?q=<br>
 
** http://blogsearch.google.com/blogsearch?q=
 
* http://ncatlab.org/nlab/show/HomePage
 
 
 
 
 
 
 
  
==experts on the field==
 
 
* http://arxiv.org/
 
  
 
 
 
 
  
 
 
 
==links==
 
 
* [http://detexify.kirelabs.org/classify.html Detexify2 - LaTeX symbol classifier]
 
* [http://pythagoras0.springnote.com/pages/1947378 수식표현 안내]
 
* [http://www.research.att.com/%7Enjas/sequences/index.html The On-Line Encyclopedia of Integer Sequences]
 
* http://functions.wolfram.com/
 
 
[[분류:개인노트]]
 
[[분류:개인노트]]
[[분류:math and physics]]
 
 
[[분류:math and physics]]
 
[[분류:math and physics]]

2013년 2월 22일 (금) 09:14 판

review of symmetric groups

  • 원소의 개수가 n인 집합의 전단사함수들의 모임
  • \(n!\) 개의 원소가 존재함
  • 대칭군의 부분군은 치환군(permutation group)이라 불림

 

 

presentation of symmetric groups

  • 생성원 \(\sigma_1, \ldots, \sigma_{n-1}\)
  • relations
    • \({\sigma_i}^2 = 1\)
    • \(\sigma_i\sigma_j = \sigma_j\sigma_i \mbox{ if } j \neq i\pm 1\)
    • \(\sigma_i\sigma_{i+1}\sigma_i = \sigma_{i+1}\sigma_i\sigma_{i+1}\\)

 

presentation of braid groups

\(B_n\)

generators \(\sigma_1,...,\sigma_{n-1}\)

relations (known as the braid or Artin relations)\[\sigma_i\sigma_j =\sigma_j \sigma_i\] whenever \(|i-j| \geq 2 \)

\(\sigma_i\sigma_{i+1}\sigma_i = \sigma_{i+1}\sigma_i \sigma_{i+1}\) for \(i = 1,..., n-2\)Yang-Baxter equation (YBE)

 

computational resource


 

related items

 

 

encyclopedia