摘要
本文利用极限过程的方法，证明了幂等阵和幂零阵的伴随矩阵分别是幂等阵和幂零阵．所得到的结论比［１］丰富得多．
Using a limit process, it is proved in this paper that the adjoint matrix of an idempotent matrix is idempotent and the adjoint matrix of a nilpotent matrix is also nilpotent. The results are richer than that in [1].
