a person in the record
Johannes George Rutgers
Dutch mathematician1880 to 1956
Wikidata names Willem Kapteyn as doctoral advisor. Linked to Wikidata, Mathematics Genealogy Project, and 2 other registers.

How to read the markscited by a repository's recordstated by Wikidata or indexed by OpenAlexclaimed on an ORCID list, or inferred
Advisors on Wikidata1
From Wikidata, shown separately from the thesis records.
- stated by Wikidata
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 WikidataWillem Kapteyn
- 2 steps up
stated by WikidataCornelius Hubertus Carolus Grinwis
- 3 steps up
stated by WikidataRichard van Rees
- 4 steps up
stated by WikidataGerard Moll
Education and career2
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- 1914 to 1950
- undatedstudied