Definition 1.6.1. A set is countable if it has the same cardinality as the set \(\mathbb N.\)
References
- Cameron, P. J. (1998). Sets, logic and categories. Springer. https://doi.org/10.1007/978-1-4471-0589-3
A backup external memory containing several data files
Definition 1.6.1. A set is countable if it has the same cardinality as the set \(\mathbb N.\)