a person in the record
Abram Fet
Russian mathematician1924 to 2007
Wikidata names Lazar Lyusternik as doctoral advisor, lists 3 doctoral students, and lists 2 people they taught. Linked to Wikidata, Mathematics Genealogy Project, and 4 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
Students on Wikidata3
From Wikidata, shown separately from the thesis records.
- stated by Wikidataborn 1930
- stated by Wikidataborn 1934
- stated by Wikidata
Taught2
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 1930
- a teacher or mentor, stated by Wikidata: not a thesis supervisionborn 1934
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 WikidataLazar Lyusternik
- 2 steps up
stated by WikidataNikolai Luzin
- 3 steps up
stated by WikidataDmitri Egorov
- 4 steps up
stated by WikidataNikolai Bugaev
Below them, within 3 steps, the record reaches 10 people: 10 stated by Wikidata.
Education and career5
From Wikidata, shown separately from the thesis records. Each place opens its Wikidata item.
- from 1960
- undatedstudied
- undated
- undatedworked
- undated