a person in the record
Eric M. Opdam
Dutch mathematicianborn 1960
Wikidata names Gerrit Heckman and Gerrit van Dijk as doctoral advisors, lists 8 doctoral students, and lists 1 person they taught. Linked to Wikidata, Mathematics Genealogy Project, and 5 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 Wikidata2
From Wikidata, shown separately from the thesis records.
- stated by Wikidata
- stated by Wikidata
Students on Wikidata8
From Wikidata, shown separately from the thesis records.
- stated by Wikidataborn 1962
- stated by Wikidataborn 1980
- stated by Wikidataborn 1982
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
Taught1
Wikidata's "student of" and "student" statements: a line of training beside the lineage, never a thesis supervision and never counted with one.
- a teacher or mentor, stated by Wikidata: not a thesis supervisionborn 1979
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 WikidataGerrit Heckmanstated by WikidataGerrit van Dijk
- 2 steps up
stated by WikidataHans Duistermaatstated by WikidataT. A. Springer
- 3 steps up
stated by WikidataHans Freudenthalstated by WikidataHendrik Kloosterman
- 4 steps up
stated by WikidataHeinz Hopfstated by WikidataJan Cornelis Kluyverstated by WikidataLudwig Bieberbach
Below them, within 3 steps, the record reaches 12 people: 12 stated by Wikidata.
Education and career2
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- undatedstudied
- undatedworked