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empty_set [2015/10/09 15:39] nikolaj |
empty_set [2015/10/09 15:40] nikolaj |
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| + | === Requirements === | ||
| + | [[Set theory]] | ||
| === Subset of === | === Subset of === | ||
| [[First infinite von Neumann ordinal]] | [[First infinite von Neumann ordinal]] | ||
