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P-COVER AND P-MAP
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作者 张凤玲 StraussDona 《Transactions of Tianjin University》 EI CAS 1997年第2期88-91,共4页
In this paper, we shall define a new concept, P map. Therefore the question which arises in will be answered satisfactorily, i.e. a frame map f: K→L from a T 2 frame K to a T 2 frame L c... In this paper, we shall define a new concept, P map. Therefore the question which arises in will be answered satisfactorily, i.e. a frame map f: K→L from a T 2 frame K to a T 2 frame L can be uniquely extended to a frame map τf:τK→τL if and only if f is a P map. 展开更多
关键词 FRAME katetov extension P map
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