| Memorial of Slovak mathematicians — October | |
| 1. 10. 1906 | Štefan Furka , was born. |
| 1. 10. 1814 | František Močnik , was born. |
| 4. 10. 1920 | Bohumír Parízek , was born. |
| 5. 10. 1777 | Ján Andrej Segner , died. |
| 8. 10. 1710 | Ján Dubovszky , died. |
| 9. 10. 1704 | Ján Andrej Segner , was born. |
| 10. 10. 1994 | Hana Kirchheimová , died. |
| 13. 10. 1980 | Ladislav Schramm , died. |
| 16. 10. 1936 | Ján Bobok , was born. |
| 18. 10. 1995 | Michal Grajcar , died. |
| 19. 10. 1915 | Zoltán Vančo , was born. |
| 20. 10. 1930 | Michal Grajcar , was born. |
| 21. 10. 1998 | Ernest Jucovič , died. |
| 21. 10. 1897 | Karel Koutský , was born. |
| 21. 10. 1989 | Karol Rečičár , died. |
| 22. 10. 1919 | Anton Kotzig , was born. |
| 23. 10. 1923 | Václav Medek , was born. |
| 25. 10. 1891 | Karol Hlučil , was born. |
| 26. 10. 1886 | Johann Hönig , died. |
