A series of the necessary and Sufficient conditions of the diagonalizable orthogonaltransformation and orthogonal matrix is given.

获得了一种求可对角化正文矩阵的特征向量的简便方法。

In this paper, the limit is broken through and a more general necessary and sufficient condition for schedulability is proposed.

突破这一限制，提出了更具一般性的可调度性分析判定充要条件。

The necessary and sufficient conditions of similarity of two idempotent matrices are proved, the idempotency of linear combinations of two idempotent matrices is discussed.

摘要证明了数域上两个同阶幂等阵相似的充要条件是它们有相同的秩；给出了幂等阵的相似标准型；讨论了两个幂等阵的线性组合仍是幂等阵的充要条件。