两个有关矩阵问题的回答

摘要

讨论了两个与矩阵有关的问题。对问题1，给出了其阶数从1到5时的回答；对问题2，给出了其彻底的否定回答。所获的结果许多情形下还可推到更广泛的情形。%Two questions about matrices are discussed . One is answered, the other is answered in case its rank=1,2,3,4,5 resp.. The results obtained in this paper can be extended in many occasions.