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TITLE:クォータニオン

- 超複素数
 i^2=j^2=k^2=ijk=-1 
 ij=k, jk=i, ki=j

- ベクトル・複素数・クォータニオン
--  http://www.pineappledesign.org/Kanaya/Quaternion.html
- 四元数・４元数・クォータニオン・ Quaternionで回転
--  http://www015.upp.so-net.ne.jp/notgeld/quaternion.html
 Q = (cos(θ/2); α sin(θ/2), β sin(θ/2), γ sin(θ/2))
 R = (cos(θ/2); -α sin(θ/2), -β sin(θ/2), -γ sin(θ/2))
 R P Q = (0; 答え)

* 関連 [#h03e8dbb]

- [[代数学>algebra]]