Subset/Examples/Initial Segment is Subset of Integers

Example of Subset

The (one-based) initial segment of the natural numbers $\N^*_{\le n}$ of integers $\Z$ is a proper subset of the set of integers $\Z$:

$\N^*_{\le n} \subsetneq \Z$

Sources

• 1965: J.A. Green: Sets and Groups ... (previous) ... (next): $\S 1.2$. Subsets: Example $9$