countable in a sentence

Examples

1. This is still infinity, but its not a countable infinity.
2. :A countable union of null sets is a null set.
3. Or maybe there is a reasonable classification for compact countable spaces?
4. Hence, they are discrete sets, so they are countable.
5. The operative word here is " countable ."
6. Since is countable, the Corollary implies that the union is countable.
7. Since is countable, the Corollary implies that the union is countable.
8. Every countable limit ordinal requires replacement for its construction analogously to ??.
9. It makes use of countable nonstandard models of Peano arithmetic.
10. \aleph _ 1 is the countable ( finite or denumerable ).