中一数学 / 有向数 / 页 1 第1章 有向数 ( Directed Numbers ) 第1章 有向数 ( Directed Numbers ) 1 . 1 正数 ( Positive Numbers ) 和 负数 ( Negative .
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... 有向线段 directed line segment 有符号数 directed number 导序集{注:这是预序集;且任两元均有共同后元者} directed set ...
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concept of directed number 定向数的概念 ; 指示数的概念
directed sum number 有向和数
number of directed cycle 有向圈的数目
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