# Piotr Mieczyslaw Hajac

> Polish mathematician

**Wikidata**: [Q102112278](https://www.wikidata.org/wiki/Q102112278)  
**Source**: https://4ort.xyz/entity/piotr-mieczyslaw-hajac


## References

1. IdRef
2. Mathematics Genealogy Project
3. Polish Science
4. Virtual International Authority File
5. Personal Authority Wikibase of the Czech Republic
6. National Library of Israel Names and Subjects Authority File