| 1. | Countable and uncountable nouns are distinguished with many / much respectively.
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| 2. | Unlike the infinite cyclic group, it is not even countable.
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| 3. | All of the ordinals discussed so far are still countable ordinals.
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| 4. | Two countable vertex-transitive graphs are called Leader in 2001.
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| 5. | E " into a countable number of disjoint measurable subsets.
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| 6. | The cocountable topology on a countable set is the discrete topology.
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| 7. | It is customary to require that the space be second countable.
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| 8. | Every open set is a countable union of such cylinder sets.
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| 9. | An extremally disconnected first countable collectionwise Hausdorff space must be discrete.
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| 10. | Essentially, yes, it means except for a countable set.
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