countable set sentence in Hindi

Examples

1. The cocountable topology on a countable set is the discrete topology.
2. Essentially, yes, it means except for a countable set.
3. The distinction is made between a countable set and an uncountable set.
4. Some authors use countable set to mean " countably infinite " alone.
5. In mathematics, more precisely in measure theory, a at most countable set.
6. In discrete mathematics, countable sets ( including finite sets ) are the main focus.
7. If is a countable set for each in then the union of all is also countable.
8. For instance, the union of a countable set of countable sets need not be countable.
9. For instance, the union of a countable set of countable sets need not be countable.
10. ZF + AC ? suffices to prove that the union of countably many countable sets is countable.