Alexander Friedmann
E15307
Alexander Friedmann was a Russian physicist and mathematician who first formulated the expanding-universe solutions to Einstein’s field equations, laying the foundations of modern cosmology.
All labels observed (2)
| Label | Occurrences |
|---|---|
| Alexander Friedmann canonical | 7 |
| Friedmann | 2 |
How this entity was disambiguated
This entity first appeared as the object of triple T65815 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: Alexander Friedmann Context triple: [FLRW cosmological models, namedAfter, Alexander Friedmann]
-
A.
Karl Schwarzschild
Karl Schwarzschild was a German physicist and astronomer best known for providing the first exact solution to Einstein’s field equations, leading to the concept of the Schwarzschild radius and black holes.
-
B.
Richard C. Tolman
Richard C. Tolman was an American physicist and physical chemist known for his contributions to statistical mechanics, thermodynamics, and cosmology, as well as his scientific advisory roles during World War II.
-
C.
Hermann Minkowski
Hermann Minkowski was a German mathematician and physicist best known for formulating the four-dimensional spacetime framework that underpins the theory of relativity.
-
D.
David Hilbert
David Hilbert was a pioneering German mathematician whose foundational work in fields such as invariant theory, axiomatic systems, and functional analysis profoundly shaped modern mathematics.
-
E.
Felix Klein
Felix Klein was a German mathematician renowned for his work in group theory, non-Euclidean geometry, and the Erlangen Program, which redefined the foundations of geometry.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: Alexander Friedmann Target entity description: Alexander Friedmann was a Russian physicist and mathematician who first formulated the expanding-universe solutions to Einstein’s field equations, laying the foundations of modern cosmology.
-
A.
Karl Schwarzschild
Karl Schwarzschild was a German physicist and astronomer best known for providing the first exact solution to Einstein’s field equations, leading to the concept of the Schwarzschild radius and black holes.
-
B.
Richard C. Tolman
Richard C. Tolman was an American physicist and physical chemist known for his contributions to statistical mechanics, thermodynamics, and cosmology, as well as his scientific advisory roles during World War II.
-
C.
Hermann Minkowski
Hermann Minkowski was a German mathematician and physicist best known for formulating the four-dimensional spacetime framework that underpins the theory of relativity.
-
D.
David Hilbert
David Hilbert was a pioneering German mathematician whose foundational work in fields such as invariant theory, axiomatic systems, and functional analysis profoundly shaped modern mathematics.
-
E.
Felix Klein
Felix Klein was a German mathematician renowned for his work in group theory, non-Euclidean geometry, and the Erlangen Program, which redefined the foundations of geometry.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
cosmologist
ⓘ
human ⓘ mathematician ⓘ physicist ⓘ |
| causeOfDeath | typhoid fever ⓘ |
| countryOfCitizenship |
Russian Empire
ⓘ
Soviet Union ⓘ |
| dateOfBirth | 1888-06-16 ⓘ |
| dateOfDeath | 1925-09-16 ⓘ |
| educatedAt |
Leningrad State University
ⓘ
surface form:
Saint Petersburg State University
|
| employer |
Main Geophysical Observatory
ⓘ
Leningrad State University ⓘ
surface form:
Petrograd University
|
| ethnicGroup | Russians ⓘ |
| familyName |
Alexander Friedmann
self-linksurface differs
ⓘ
surface form:
Friedmann
|
| fieldOfWork |
cosmology
ⓘ
general relativity ⓘ mathematics ⓘ physics ⓘ |
| givenName | Alexander ⓘ |
| hasAcademicDiscipline |
differential equations
ⓘ
fluid dynamics ⓘ theoretical physics ⓘ |
| influenced |
Georges Lemaître
ⓘ
modern physical cosmology ⓘ |
| influencedBy |
Albert Einstein
ⓘ
Hendrik Lorentz ⓘ |
| knownFor |
FLRW cosmological models
ⓘ
surface form:
Friedmann equations
expanding universe models ⓘ solutions of Einstein field equations ⓘ |
| languageOfWorkOrName | Russian ⓘ |
| memberOf |
Russian Academy of Sciences institutes
ⓘ
surface form:
Russian Academy of Sciences
|
| nativeLanguage | Russian ⓘ |
| notableIdea |
closed and open cosmological models
ⓘ
non-static universe ⓘ |
| notableWork |
On the Curvature of Space
ⓘ
On the Curvature of Space ⓘ
surface form:
On the Possibility of a World with Constant Negative Curvature of Space
|
| occupation | university teacher ⓘ |
| participatedIn | World War I ⓘ |
| placeOfBirth |
Russian Empire
ⓘ
St. Petersburg ⓘ
surface form:
Saint Petersburg
|
| placeOfDeath |
Leningrad
ⓘ
Russian SFSR ⓘ Soviet Union ⓘ |
| religion | Russian Orthodox Church ⓘ |
| sexOrGender | male ⓘ |
| workLocation |
Leningrad
ⓘ
Leningrad ⓘ
surface form:
Petrograd
|
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: Alexander Friedmann Description of subject: Alexander Friedmann was a Russian physicist and mathematician who first formulated the expanding-universe solutions to Einstein’s field equations, laying the foundations of modern cosmology.
Referenced by (9)
Full triples — surface form annotated when it differs from this entity's canonical label.
this entity surface form:
Friedmann
this entity surface form:
Friedmann