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ordered pair
Sign in to saveAlso known as (a, b), couple, double, pair, 2-tuple
pair of mathematical objects; tuple of specific length (tuple length n=2)
~20 min read
Encyclopedic overview
Analytic geometry associates to each point in the Euclidean plane an ordered pair. The red ellipse is associated with the set of all pairs (x,y) such that x/4 + y = 1.
In mathematics, an ordered pair, denoted (a, b), is a pair of objects in which their order is significant. If a and b are different, then (a,b) is different from (b,a). In contrast, the unordered pair {a,b} always equals the unordered pair {b,a}.
Excerpted from Wikipedia’s “ordered pair” article, available under the CC BY-SA 4.0 licence.