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countable_union [2013/08/30 15:50] nikolaj |
countable_union [2013/09/14 16:50] nikolaj |
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| ===== Countable union ===== | ===== Countable union ===== | ||
| ==== Definition ==== | ==== Definition ==== | ||
| - | | @#88DDEE: $A\in \mathrm{Sequence}(X)\ \lor\ A\in\mathrm{FinSequence}(X)$ | | + | | @#88DDEE: $A\in \mathrm{Sequence}(X) $ | |
| | @#88DDEE: $n\in \mathbb N\cup\{\infty\}$ | | | @#88DDEE: $n\in \mathbb N\cup\{\infty\}$ | | ||
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| ==== Discussion ==== | ==== Discussion ==== | ||
| - | ==== Context ==== | + | ==== Parents ==== |
| + | === Refinement of === | ||
| + | [[Indexed union]] | ||
| === Requirements === | === Requirements === | ||
| - | [[Arbitrary union]], [[Sequence]], [[Finite sequence]] | + | [[Sequence]] |
