Successor Mapping on Natural Numbers is Progressing/Proof 2
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Theorem
Let $\omega$ denote the set of natural numbers as defined by the von Neumann construction.
Let $s: \omega \to \omega$ denote the successor mapping on $\omega$.
Then $s$ is a progressing mapping.
Proof
By definition, the successor mapping on $\omega$ is indeed an example of a successor mapping.
The result follows from Successor Mapping is Progressing.
$\blacksquare$