Injective map
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Revision 3233
8/31/2026, 7:06:46 PM · T.W
Added exercise "Étude de l’injectivité d’une application selon des paramètres."
linked exercisesNoneÉtude de l’injectivité d’une application selon des paramètres.
Revision 2667
8/29/2026, 3:54:31 PM · Catalpa
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An injective map is...1
An injective map is a map which has at least one unique preimage for each element of its set of destination.2
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##### Formal definition4
For two sets $A$ and $B$, the map $f: A \rightarrow B$ is injective if and only if, we have:5
$\forall y \in B$, there is at least one $x \in A$ such as $f(x)=y$.Revision 248
7/7/2026, 9:05:00 AM · Ancient Tree
Concept created
An injective map is...