"Minors and plucker relations"의 두 판 사이의 차이
둘러보기로 가기
검색하러 가기
Pythagoras0 (토론 | 기여) |
|||
| (사용자 3명의 중간 판 21개는 보이지 않습니다) | |||
| 1번째 줄: | 1번째 줄: | ||
| − | + | ==introduction== | |
| − | + | # (mat = Array[Subscript[a, ##] &, {3, 3}]) // MatrixForm Minors[mat] // MatrixForm Minors[mat, 1] // MatrixForm Minors[mat, 2] // MatrixForm Minors[mat, 3] // MatrixForm | |
| + | # Simplify[Subscript[a, 1, 3]*(-Subscript[a, 1, 2] Subscript[a, 2, 1] + Subscript[a, 1, 1] Subscript[a, 2, 2]) + Subscript[a, 1, 1]*(-Subscript[a, 1, 3] Subscript[a, 2, 2] + Subscript[a, 1, 2] Subscript[a, 2, 3])] | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | + | ||
| − | |||
| − | + | ==3-term Plucker relation (Ptolemy relation)== | |
| − | + | * <math>\Delta _{i,k} \Delta _{j,l}=\Delta _{i,j} \Delta _{k,l}+\Delta _{i,l} \Delta _{j,k}</math> | |
| + | * <math>\Delta _{1,2}\Delta _{3,4}+\Delta _{1,4}\Delta _{2,3}=\Delta _{1,3}\Delta _{2,4}</math> | ||
| − | + | # T := {{Subscript[a, 1, 1], Subscript[a, 1, 2], Subscript[a, 1, 3], Subscript[a, 1, 4]}, {Subscript[a, 2, 1], Subscript[a, 2, 2], Subscript[a, 2, 3], Subscript[a, 2, 4]}} Minor[i_, j_] := Det[{Transpose[T][[i]], Transpose[T][[j]]}] Minor[1, 2] | |
| + | # Simplify[Minor[1, 2] Minor[3, 4] + Minor[1, 4] Minor[2, 3]] Simplify[Minor[1, 3] Minor[2, 4]] | ||
| − | + | ||
| − | + | ||
| − | + | ==Plucker relations== | |
| − | + | * <math>\Delta _{1,2}\Delta _{12,13}=\Delta _{1,3}\Delta _{12,12}+\Delta _{1,1}\Delta _{12,23}</math> | |
| − | |||
| − | + | # \Delta _{12,12}\text{:=}-a_{1,2} a_{2,1}+a_{1,1} a_{2,2}\Delta _{12,23}\text{:=}-a_{1,3} a_{2,2}+a_{1,2} a_{2,3}\Delta _{1,3}\text{:=}a_{1,1}\Delta _{1,3}\text{:=}a_{1,3}\Delta _{1,3}\Delta _{12,12}+\Delta _{1,1}\Delta _{12,23} | |
| + | |||
| + | |||
| + | |||
| + | |||
| + | |||
| + | ==Plucker coordinates of a Grassmannian== | ||
| − | + | ||
| − | + | ||
| − | + | ==memo== | |
| − | + | * [http://www.math.msu.edu/%7Emagyar/papers/MinorIdentities.pdf http://www.math.msu.edu/~magyar/papers/MinorIdentities.pdf] | |
| + | * http://www.ams.org/journals/proc/2008-136-01/S0002-9939-07-09122-8/S0002-9939-07-09122-8.pdf | ||
| + | [[분류:개인노트]] | ||
| + | [[분류:math and physics]] | ||
| + | [[분류:math]] | ||
| + | [[분류:migrate]] | ||
| + | |||
| + | ==메타데이터== | ||
| + | ===위키데이터=== | ||
| + | * ID : [https://www.wikidata.org/wiki/Q2996684 Q2996684] | ||
| + | ===Spacy 패턴 목록=== | ||
| + | * [{'LOWER': 'plücker'}, {'LEMMA': 'embedding'}] | ||
2021년 2월 17일 (수) 01:42 기준 최신판
introduction
- (mat = Array[Subscript[a, ##] &, {3, 3}]) // MatrixForm Minors[mat] // MatrixForm Minors[mat, 1] // MatrixForm Minors[mat, 2] // MatrixForm Minors[mat, 3] // MatrixForm
- Simplify[Subscript[a, 1, 3]*(-Subscript[a, 1, 2] Subscript[a, 2, 1] + Subscript[a, 1, 1] Subscript[a, 2, 2]) + Subscript[a, 1, 1]*(-Subscript[a, 1, 3] Subscript[a, 2, 2] + Subscript[a, 1, 2] Subscript[a, 2, 3])]
3-term Plucker relation (Ptolemy relation)
- \(\Delta _{i,k} \Delta _{j,l}=\Delta _{i,j} \Delta _{k,l}+\Delta _{i,l} \Delta _{j,k}\)
- \(\Delta _{1,2}\Delta _{3,4}+\Delta _{1,4}\Delta _{2,3}=\Delta _{1,3}\Delta _{2,4}\)
- T := {{Subscript[a, 1, 1], Subscript[a, 1, 2], Subscript[a, 1, 3], Subscript[a, 1, 4]}, {Subscript[a, 2, 1], Subscript[a, 2, 2], Subscript[a, 2, 3], Subscript[a, 2, 4]}} Minor[i_, j_] := Det[{Transpose[T]i, Transpose[T]j}] Minor[1, 2]
- Simplify[Minor[1, 2] Minor[3, 4] + Minor[1, 4] Minor[2, 3]] Simplify[Minor[1, 3] Minor[2, 4]]
Plucker relations
- \(\Delta _{1,2}\Delta _{12,13}=\Delta _{1,3}\Delta _{12,12}+\Delta _{1,1}\Delta _{12,23}\)
- \Delta _{12,12}\text{:=}-a_{1,2} a_{2,1}+a_{1,1} a_{2,2}\Delta _{12,23}\text{:=}-a_{1,3} a_{2,2}+a_{1,2} a_{2,3}\Delta _{1,3}\text{:=}a_{1,1}\Delta _{1,3}\text{:=}a_{1,3}\Delta _{1,3}\Delta _{12,12}+\Delta _{1,1}\Delta _{12,23}
Plucker coordinates of a Grassmannian
memo
- http://www.math.msu.edu/~magyar/papers/MinorIdentities.pdf
- http://www.ams.org/journals/proc/2008-136-01/S0002-9939-07-09122-8/S0002-9939-07-09122-8.pdf
메타데이터
위키데이터
- ID : Q2996684
Spacy 패턴 목록
- [{'LOWER': 'plücker'}, {'LEMMA': 'embedding'}]