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I don't know -- I didn't downvote you, but you might want to edit to indicate that x and y are not necessarily finite sets. (For finite sets, the result is triv
by winstonsmith 12y ago
I don't know -- I didn't downvote you, but you might want to edit to indicate that x and y are not necessarily finite sets. (For finite sets, the result is trivial.)
- ronaldx 12y agoThanks. I think mjw's comment, and yours, now correctly cover this :)