In this paper we give a necessary and sufficient condition on diagonalization matrix.
本文给出矩阵可对角化的一个充要条件。
A necessary and sufficient condition of the existence of prime model is proved.
研究了主型的有关性质，证明了一个素模型存在的充分必要条件。
A necessary and sufficient condition of the existence of prime model is proved.
研究了主型的有关性质，证明了一个素模型存在的充分必要条件。
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