以下为句子列表：
英文: Corank and normal equivolent of Infinite Matrices over a sfield are difined, and a proof that any row-column-finite infinite matrix over a sfield is existence and unique is given.
中文: 摘要定义了除环上无限方阵的余秩和正则等价，证明了除环上每个行列有限的无限方阵的余秩存在且唯一。
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