cardinal number meaning
ENWCardinal number
- In mathematics, cardinal numbers, or cardinals for short, are a generalization of the natural numbers used to measure the cardinality (size) of sets. The cardinality of a finite set is a natural number: the number of elements in the set.
- Cardinality is defined in terms of bijective functions. Two sets have the same cardinality if, and only if, there is a one-to-one correspondence (bijection) between the elements of the two sets.
- There is a transfinite sequence of cardinal numbers:
- This sequence starts with the natural numbers including zero (finite cardinals), which are followed by the aleph numbers (infinite cardinals of well-ordered sets). The aleph numbers are indexed by ordinal numbers.
- NounPLcardinal numbers
- A number used to denote quantity; a counting number.
- The smallest cardinal numbers are 0, 1, 2, and 3.
- The cardinal number "three" can be represented as "3" or "three".
- (mathematics) A generalized kind of number used to denote the size of a set, including infinite sets.
- (grammar) A word that expresses a countable quantity; a cardinal numeral.
- "Three" is a cardinal number, while "third" is an ordinal number.
- A number used to denote quantity; a counting number.
Definition of cardinal number in English Dictionary
- Part-of-Speech Hierarchy
- Nouns
- Countable nouns
- Countable nouns
- Nouns
Source: Wiktionary
Grammatically, this idiom "cardinal number" is a noun, more specifically, a countable noun.