In this paper, ma-trices with extremal signed null-spaces and extremal quasi S*- matrices are introduced and characterized through the minimal standard term rank decomposition of matrices.
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为此,提出了有极符号零空间的矩阵与极拟S*-阵,并通过引入矩阵的列极小的标准项秩分解型的概念,给出了它们的特征刻划。
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