Ordered pair

Rarity: Rare

A topic known well beyond its field, found in many languages.

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At a glance

Class

Notion

Domain

Science and technology

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What Wikipedia says

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}.

Excerpt from the Wikipedia article “Ordered pair”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: TB5ivVaO1y55FkAogw1X,Thomas W, CC BY-SA 4.0, via Wikimedia Commons.