Cardinal: Revision history

25 March 2024

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3 September 2023

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1 September 2023

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31 August 2023

• curprev 22:4222:42, 31 August 2023‎ C7X talk contribs‎ 890 bytes +890‎ Created page with "Cardinals are an extension of the natural numbers that describe the size of a set. There are two ways to define cardinality: cardinals as initial ordinals, or cardinals as equivalence classes under bijectability. The second is more common in settings without the axiom of choice, since not all sets are necessarily well-orderable.{{citation needed}} The aleph numbers are examples of well-ordered cardinals, and exhaust the infinite well-ordered cardinals.{{citation nedede..."