正定二次型的几个等价条件以及正定矩阵的若干性质

Conditions of Equivalence of Positive Definite Quadratic Form and Properties of Positive Definite Matrix

本文根据正定二次型的定义给出了它的几个等价条件;并且通过对正定矩阵的考察,给出了正定矩阵的若干性质.

The conditions of equivalence of positive definite quadratic form are given ac-cording to its definition and some properties of positive definite matrix are given too in thepaper.