| 11. | A "'large cardinal "'is a cardinal number with an extra property.
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| 12. | Cardinal numbers are often used although considered incorrect : " secolul paisprezece ".
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| 13. | Ordinal numbers can be defined with the same method used for cardinal numbers.
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| 14. | The smallest infinite cardinal number is \ aleph _ 0 ( aleph-one ).
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| 15. | Assume the contrary, and let " C " be the largest cardinal number.
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| 16. | Calendar dates in Romanian are expressed using cardinal numbers, unlike English.
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| 17. | In 1968, the " raions " became sectors, their names replaced by cardinal numbers.
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| 18. | In category theory, the cardinal numbers form a skeleton of the category of sets.
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| 19. | Default is " zero " for cardinal numbers, " zeroth " for ordinal numbers.
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| 20. | Also, for more of this see cardinality and cardinal number.
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