摘要
本文研究了Dn中幂等元的某些性质,给出了幂等元的另一个等价刻划以及两幂等元之积仍是幂等元的一个充要条件。
This paper investigates some properties of idempotent matrices in D,. We give another equivalence description of idempotent matrices and a necessary and sufficient condition that the product of two idempotent matrices is still idempotent.
出处
《数学研究》
CSCD
2003年第4期384-387,共4页
Journal of Mathematical Study
基金
This project is supported by thc NSF of China(10071068)
关键词
双随机矩阵
幂等矩阵
doubly stochastic matrix
idempotent matrix
