拟亚正定阵及其子结构

Quasi-hypo Positive Definite Matrices arid Its Substructure

本文引进拟亚正定阵的概念，讨论了它的若干性质及其子结构，证明了拟亚正定降的加性复合阵还是拟亚正定阵，从而改进了文［５］中的一个结果。

In this paper, the concept of quasi-hypo positive definite matrices has been introduced; several properties and its substrtrcture has been discussed and it has been proved that additive eompound matrices of quasi-hypo positive definite matrices are just quasi - hypo positive definite matrices; therofore, one result in [5]is improved.