a person in the record
Matthias Ehrhardt
German mathematicianborn 1968
Supervised 4 doctoral students; Wikidata names Anton Arnold and Rolf Dieter Grigorieff as doctoral advisors and lists 10 doctoral students. Linked to Wikidata, ORCID, and 6 other registers.

How to read the markscited by a repository's recordstated by Wikidata or indexed by OpenAlexclaimed on an ORCID list, or inferred
Students4
- cited by a thesis record
- cited by a thesis record2024 · doctoral
- cited by a thesis record
- cited by a thesis record
Advisors on Wikidata2
From Wikidata, shown separately from the thesis records.
- stated by Wikidata
- stated by Wikidata
Students on Wikidata10
From Wikidata, shown separately from the thesis records.
- stated by Wikidataborn 1990
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
- stated by Wikidata
- 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 WikidataAnton Arnoldstated by WikidataRolf Dieter Grigorieff
- 2 steps up
stated by WikidataFriedrich Stummelstated by WikidataGottfried Köthe
- 3 steps up
stated by WikidataAnton Rellastated by WikidataFranz Rellichstated by WikidataRobert Daublebsky von Sterneckstated by WikidataRobert Daublebsky von Sterneck der Jüngere
- 4 steps up
stated by WikidataEmil Weyrstated by WikidataFranz Mertensstated by WikidataGustav von Escherichstated by WikidataPhilipp Furtwänglerstated by WikidataRichard Courant
Below them, within 3 steps, the record reaches 14 people: 4 cited by thesis records, 10 stated by Wikidata.
Education and career2
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- undated
- undatedworked