本文基于反对称矩阵的谱集，采用正交相似变换，得到一类具有零对角的符号模式矩阵具有唯一惯量的结论。

Based on the spectral set of skew-symmetric matrix, the result that a class sign pattern matrix with zero diagonal is unique inertia was proved by using orthogonal similarity transformation.

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对含正对角元的对称本原矩阵的本原指数集的分布进行具体的研究，得到几类本原矩阵的分布规律。

In this paper we study some classes of symmetric primitive matrix with trace nonzero, and obtain their characterization.

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对含正对角元的对称本原矩阵的本原指数集的分布进行具体的研究，得到几类本原矩阵的分布规律。

In this paper we study some classes of symmetric primitive matrix with trace nonzero, and obtain their characterization.

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