上集是什么意思-上集的词语解释-相关组词-词语-近音词-同音词 - 掌上跨屏通词语词典

题目

更新时间：2024-09-08 12:45:12

求解答，词语上集是什么意思？再说说上集有什么含义？

答案

上集的百科含义

上集（upper set）对于一个偏序集（P，≦），A包含于P，定义↑A=〈y∈P∣存在x∈A，x≦y〉,如果A=↑A,我们把A成为（P,≦）的上集，同理下集也是这样定义的。

上集的词语组词

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