countable (definition)

See all of countable, there are 4 more in this node.

A random real is irrational	enumerable set	uncountable	finite vs. countable vs. uncountable
Science is countable	Denumerable	Baire category theorem	The set of rational numbers is countably infinite
recursively enumerable	first countable	natural number	rational number
inaccessible cardinal	Winfree's paradox	proof of Hall's Marriage Theorem	second countable
Everything2 mascot candidates	diagonal argument	the smallest number that looks prime but isn't	Mapping the power set of the integers to the real numbers
definable number	Proof that the set of transcendental numbers is uncountable	σ algebra