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子集

出自维基百科，自由个百科全书

子集，为某个集合中一部分个集合，所以也称部分集合。

若A搭B为集合，外加A个所有元素侪是B个元素，则有：A是B个子集（或称包含于B）。

取自“https://wuu.wikipedia.org/w/index.php?title=子集&oldid=275307”
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