Categories:Propriété de fonction,
Théorie des ensembles
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injectionfonction injectiveapplication injectivefonction de un à unfonction unique à gauche
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Une application f est dite injective ou est une injection si tout élément de son ensemble d'arrivée a au plus un antécédent par f, ce qui revient à dire que deux éléments distincts de son ensemble de départ ne peuvent pas avoir la même image par f.
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more...
FR
Une application f est dite injective ou est une injection si tout élément de son ensemble d'arrivée a au plus un antécédent par f, ce qui revient à dire que deux éléments distincts de son ensemble de départ ne peuvent pas avoir la même image par f.
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Une application pour laquelle, pour tout élément de l'ensemble d'arrivée, il existe au plus un antécédent dans l'ensemble de départ.
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