"union" in inglés with examples - Collocation dictionary inglés
- An F set is a countable union of closed sets.
- For example, the three dimensional Euclidean space is not a countable union of its affine planes.
- An open set on the real line has the characteristic property that it is a countable union of disjoint open intervals.
- More generally, any countable union of null sets is null.
- Any finite or countable union of shy sets is also shy.
- Strongly Lindelöf spaces are closed under taking countable unions, subspaces, and continuous images.
- Every open set in the subshift of finite type is a countable union of cylinder sets.
- That is, the Borel sets are closed under countable unions.
- Then every open subset of the real line is a countable union of open intervals.
- In G spaces, every open set is the countable union of closed sets.
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