Countable set > Related Articles

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Parent topics

• Cardinality [r]: The size, i.e., the number of elements, of a (possibly infinite) set. [e]
• Set (mathematics) [r]: Informally, any collection of distinct elements. [e]
• Set theory [r]: The study of collections or properties of sets. [e]

Subtopics

• Aleph-0 [r]: Cardinality (size) of the set of all natural numbers. [e]

Other related topics

• Infinity [r]: Add brief definition or description
• Natural number [r]: An element of 1, 2, 3, 4, ..., often also including 0. [e]
• Galileo's paradox [r]: The observation that there are fewer perfect squares than natural numbers but also equally many. [e]
• Hilbert's hotel [r]: A fictional story which illustrates certain properties of infinite sets. [e]
• Cantor's diagonal argument [r]: Proof due to Georg Cantor showing that there are uncountably many sets of natural numbers. [e]