A few of inequalities about elementary symmetrical polynomial will be established in the following in an elementary way.
本文将用初等的方法，建立几个关于初等对称多项式的不等式。
In this paper, the concept of the characteristic polynomial, the converse graph, the symmetrical closure and others are defined.
本文引入有向图的特征多项式、反图、对称闭包等概念。初步探讨它们与图的某些整体性质的关系。
In this paper, the concept of the characteristic polynomial, the converse graph, the symmetrical closure and others are defined.
本文引入有向图的特征多项式、反图、对称闭包等概念。初步探讨它们与图的某些整体性质的关系。
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