周金秋,曹文胜
关于四元数Möbius变换的分类判别
周金秋,曹文胜
(五邑大学 数学与计算科学学院,广东 江门 529020)
基于变换作用和等距球的性质,得到了变换的一个分解. 利用旋转与对应的变换不动点的关系,得出四元数变换是椭圆变换和抛物变换的充分必要条件.
四元数;变换;等距球;不动点
下面给出基于不动点个数和右特征值模的元素分类.
2 几则引理
是的一个不动点,则有:
.
故而
是椭圆的或抛物的,则有:
3 主要结论及证明
是规范的且,那么是椭圆的当且仅当,并且.
变形得:
代入式(5)得:
是规范矩阵且,那么是抛物的当且仅当,并且.
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[责任编辑:熊玉涛]
On the Classification of QuaternionicTransformations
ZHOUJin-qiu, CAOWen-sheng
(School of Mathematics and Computational Science, Wuyi University, Jiangmen 529020, China)
Based on the action oftransformations and the property of its isometric spheres, we obtain a decomposition oftransformation. By using the relationship of the fixed points of the rotation partand, we obtain the sufficient and necessary conditions for elliptic transformations and parabolic transformations.
quaternion;transformation; isometric spheres; fixed points
1006-7302(2015)02-0001-05
O151.21
A
2014-10-24
国家自然科学基金资助项目(10801107)
周金秋(1988—),女,江西吉安人,在读硕士生,研究方向为复分析;曹文胜,教授,博士,硕士生导师,通信作者,研究方向为复分析.