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为了研究半环上矩阵的加权群逆,引入半环上矩阵的群逆及T-V逆.以半环上矩阵的映射和余格为基础,刻画半环上矩阵的加权群逆,给出半......
<正>Let X be a Banach space. If there exists a quotient space of X which is asymptotically isometric to l1, then X conta......