Subset/Examples/Initial Segment is Subset of Integers
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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 $9$