# countable

A set $S$ is countable if there exists a bijection between $S$ and some subset of $\mathbb{N}$.

All finite sets are countable.

Title countable Countable 2013-03-22 11:59:00 2013-03-22 11:59:00 vampyr (22) vampyr (22) 6 vampyr (22) Definition msc 03E10 ProofThatTheRationalsAreCountable CantorSet AverageValueOfFunction NumerableSet SierpinskiSetOfEuclideanPlane