a person in the record
Willem J. Heiser
Dutch social scientistborn 1949
Wikidata names Jan de Leeuw and John P. van de Geer as doctoral advisors and lists 2 doctoral students. Linked to Wikidata, Mathematics Genealogy Project, and 4 other registers.
How to read the marksstated by Wikidata or indexed by OpenAlex
Advisors on Wikidata2
From Wikidata, shown separately from the thesis records.
- stated by Wikidata
- stated by Wikidata
Students on Wikidata2
From Wikidata, shown separately from the thesis records.
- stated by Wikidataborn 1964
- stated by Wikidataborn 1978
The line above and below4 steps
The advisors of their advisors, four steps up at most, in the thesis records and on Wikidata, each kind marked; a person in both is listed once.
- 1 step up
stated by WikidataJan de Leeuwstated by WikidataJohn P. van de Geer
- 2 steps up
stated by WikidataAlphons Maria Jozef Chorus
- 3 steps up
stated by WikidataTheo Rutten
- 4 steps up
stated by WikidataFranciscus Roels
Below them, within 3 steps, the record reaches 4 people: 4 stated by Wikidata.
Education and career2
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- 1989 to 2014worked
- undatedstudied