# Jan Popken

> Dutch number theorist (1905–1970)

**Wikidata**: [Q15433346](https://www.wikidata.org/wiki/Q15433346)  
**Source**: https://4ort.xyz/entity/jan-popken


## References

1. Catalogus Professorum Academiae Rheno-Traiectinae
2. MacTutor History of Mathematics archive
3. [Source](https://www.math.rug.nl/bernoulli/Geschiedenis/Popken)
4. Album Academicum
5. Mathematics Genealogy Project
6. [Source](https://ca.billiongraves.international/grave/J-Popken/36301508)
7. [Mathematics Genealogy Project](http://www.genealogy.ams.org/id.php?id=45998)
8. [Mathematics Genealogy Project](http://www.genealogy.ams.org/id.php?id=46005)
9. Biografisch Portaal
10. KNAW Past Members
11. Virtual International Authority File