Talk:Subset
I moved the last two paragraphs here from Power set, since they seem more appropriate here.
By the way, is it equivalent to say that X ⊂ Y iff X contains no elements that are not members of Y? It seems essentially the same, and is more obviously satisfied by the empty set.
- Stuart
Yes, that's equivalent. --AxelBoldt
Given that this is an encyclopedia and not a dictionary, is any purpose served by having 3 articles, subset, proper subset, and superset? If there's something interesting to say about one of these that doesn't fit in with another, then yes, but I doubt that this is the case. If there are no objections, I'll be combining the articles here and redirecting the others (and maybe the yet nonexistent proper superset too). -- Toby Bartels, Sunday, May 19, 2002