Cardinality

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Formal Definition

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The number of elements in a set X is the cardinality of X and is often denoted by |X|.

Informal Definition

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Cardinality is the number of elements in a given set.

Example(s)

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$| \{a,b,c\} | = 3$

Non-example(s)

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$| \{543,789,356,354,5,7\}| = 3$

Additional Comments

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