期刊信息
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- 刊名: 河北师范大学学报(自然科学版)Journal of Hebei Normal University (Natural Science)
- 主办: 河北师范大学
- ISSN: 1000-5854
- CN: 13-1061/N
- 中国科技核心期刊
- 中国期刊方阵入选期刊
- 中国高校优秀科技期刊
- 华北优秀期刊
- 河北省优秀科技期刊
Semi-groups of Positively Definite Matrices
摘要/Abstract
摘要:
以Pn(R)表示所有n×n实正定矩阵的集合,用Pn(A)表示使得AB+BA正定的n×n实矩阵B的全体.对正定矩阵A证明了Pn(A)是Pn(R)的子半群,作为半群二者同构.
Abstract:
Let Pn(R) be the semi group of all n by n positively definite matrices and let Pn(A) be the set of all n by n real matrices such that AB+BA are positively definite.It is proved that Pn(A) is a subsemigroup of the semi group Pn(R),and there is a semi group isomorphism between Pn(A) and Pn(R) .
关键词
Key words:
semi-g roup
;
semi-group isomorphism
;
positively definite matrices