Mapping/Examples/Birthday of Person

Example of Mapping

Let $P$ be the set of all people.

Let $S$ be the set of all dates in the calendar.

Let $\chi: P \to S$ be the mapping defined as:

$\forall x \in P: \map \chi x = \text { the birthday of $x$}$

Sources

• 1998: David Nelson: The Penguin Dictionary of Mathematics (2nd ed.) ... (previous) ... (next): function (map, mapping)
• 2008: David Nelson: The Penguin Dictionary of Mathematics (4th ed.) ... (previous) ... (next): function (map, mapping)