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References to 'numerable set'
1. Book of Numbers by PrimeFan
2. construction of well-formed formulas by CWoo
3. example of a meager set by Wkbj79
4. example of a universal structure by uzeromay
5. example of bijection by juanman
6. Hausdorff measure by paolini
7. nonempty perfect subset of $\mathbb{R}$ that contains no rational number, a by Gorkem
8. predicativism by gribskoff
9. proof of classification of separable Hilbert spaces by rspuzio
10. random graph (infinite) by bbukh
11. theory of formal languages by rspuzio