1、
in this paper, we mainly discuss special f-precover and f-preenvelope on short exact sequence.
本文主要讨论短正合列上特殊的F-预复盖与F-预包络。
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2、
in this paper, we mainly discuss special f-precover and f-preenvelope on short exact sequence.
本文主要讨论短正合列上特殊的F-预复盖与F-预包络。
互联网摘选
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