Subset/Examples/Integers are Subset of Real Numbers

Example of Subset

The set of integers $\Z$ is a proper subset of the set of real numbers $\R$:

$\Z \subsetneq \R$


Sources

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