Definition: Identity Function
Let $A$ be a set. The function $id_A:A\to A$, $id(a)=a$ for all $a\in A$ is called the identity function on $A.$
Mentioned in:
Examples: 1 2
Proofs: 3
Propositions: 4
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References
Bibliography
- Knauer Ulrich: "Diskrete Strukturen - kurz gefasst", Spektrum Akademischer Verlag, 2001
