Cardinal numbers are sets. And after that comes ordinals, which are enumerated numbers. [1] https://en.wikipedia.org/wiki/Cardinal_number https://en.wikipedia.

Cardinal numbers are sets. And after that comes ordinals, which are enumerated numbers. [1] https://en.wikipedia.org/wiki/Cardinal_number https://en.wikipedia.org/wiki/Cardinal_number [2] https://en.wikipedia.org/wiki/Ordinal_number https://en.wikipedia.org/wiki/Ordinal_number