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Googling for "hereditarily finite" finds 650 hits, mostly to mathematical papers. I think it's a valid concept. However, the article could do with a lot of expansion, as at the moment it does not give me the first clue what "hereditarily finite" means. --
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I see a square on this page where there should be a union symbol (a bit like a big plain capital U). Do other people get the same thing, or is it my font? If it is broke, can someone fix it who knows how?
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are where people discuss how to make content on
Knowledge the best that it can be. You can use this page to start a discussion with others about how to improve the "
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definitions are usually not the most instructive ones. A hereditarily finite set is finite, and all of its members are themselves hereditarily finite. A
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It's the HTML entity ∪ a bit larger because TeX was stuffing up before. I think I'll rewrite it in TeX, but it probably won't render good at the moment.
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set some of whose members, or the members of whose members, etc., are sets that are not finite, is finite but not hereditarily finite.
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It's important in maths. If I get round to it, I'll write some content to explain why, but in any case keep. --
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Certainly it's a valid concept, but the article could elaborate.
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Probably a weird dream of an aspiring mathematician. --
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