Definition:Integer/Historical Note
Historical Note on Integer
The use of $Z$ to denote the set of integers appears to have originated with Nicolas Bourbaki.
Earlier, the symbol $\overline{\mathfrak Z}$ had been used by Edmund Landau.
Sources
- 2008: David Joyner: Adventures in Group Theory (2nd ed.) ... (previous) ... (next): $\S 1.2$: Elements, my dear Watson