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<正>On Projective Modules with Constant RanksIn this paper,we investigate module structures of rings over which every fi......

<正>Let A be an unital Banach algebra with the unital element I. We denote the set of (n&#215;n)-matrices over A by Mn(A......

用代数K-理论的方法可把整二次型分类问题分解为研究非退化对称双线性格范畴的K_0群结构和Witt消去律的存在。么模Z-格的K_0群结构......