A set A is countably infinite if there exists a function f:A \to \mathbb{N} such that f is bijective, where \mathbb {N} is the set of Natural numbers.

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.