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Concept · Foundations
The Cartesian product A × B of two sets is the set of all ordered pairs (a, b) where a ∈ A and b ∈ B.
Why it matters
The Cartesian product turns pairs of sets into a new set and is the construction that lets relations and functions be defined set-theoretically.
Where this shows up
Following the links will take you to the page where this term is introduced in context.
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