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domain (Definition)

Let $ R$ be a binary relation. Then the set of all $ x$ such that $ x R y$ is called the domain of $ R$. That is, the domain of $ R$ is the set of all first coordinates of the ordered pairs in $ R$.



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Cross-references: ordered pairs, coordinates, binary relation
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This is version 5 of domain, born on 2001-11-19, modified 2002-03-08.
Object id is 966, canonical name is Domain3.
Accessed 4666 times total.

Classification:
AMS MSC: 03E20 (Mathematical logic and foundations :: Set theory :: Other classical set theory )
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