a person in the record
Johan Bernard Ubbink
Ph.D. Universiteit Leiden 1945
Wikidata names Hans Kramers as doctoral advisor. Linked to Wikidata and Mathematics Genealogy Project.
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 WikidataHans Kramers
- 2 steps up
stated by WikidataPaul Ehrenfest
- 3 steps up
stated by WikidataLudwig Boltzmann
- 4 steps up
stated by WikidataJosef Stefan
Education and career1
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- undatedstudied