Preview (5 of 12 cards)
What is a relation?
A subset of the Cartesian product A × B, linking elements of set A to set B
What is a function?
A relation where every element in domain has exactly one image in codomain
What is a one-one (injective) function?
A function where different inputs always give different outputs
What is an onto (surjective) function?
A function where every element of codomain has at least one preimage
What is a bijective function?
A function that is both one-one and onto
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