LTB metric
E458534
cosmological model
exact solution of Einstein's field equations
gravitational collapse model
inhomogeneous dust solution
spherically symmetric spacetime metric
The LTB metric is an exact solution of Einstein’s field equations describing a spherically symmetric, inhomogeneous dust-filled universe used in cosmology and gravitational collapse studies.
All labels observed (1)
| Label | Occurrences |
|---|---|
| LTB metric canonical | 1 |
How this entity was disambiguated
This entity first appeared as the object of triple T4661767 — 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: LTB metric Context triple: [Lemaître–Tolman metric, hasAlternativeName, LTB metric]
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A.
TLB
TLB is a popular paraphrased English version of the Bible aimed at making the text easily understandable in contemporary language.
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B.
TLT
TLT is the time zone abbreviation used for Timor Leste Time, the standard time observed in East Timor.
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C.
LTL
LTL is the former official currency code for the Lithuanian litas, which was replaced by the euro in 2015.
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D.
LTL
LTL is the National Rail station code for Littleborough railway station in Greater Manchester, England.
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E.
Lt
Lt is the standard military abbreviation for the commissioned officer rank of Lieutenant in the Australian Army.
- 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: LTB metric Target entity description: The LTB metric is an exact solution of Einstein’s field equations describing a spherically symmetric, inhomogeneous dust-filled universe used in cosmology and gravitational collapse studies.
-
A.
TLB
TLB is a popular paraphrased English version of the Bible aimed at making the text easily understandable in contemporary language.
-
B.
TLT
TLT is the time zone abbreviation used for Timor Leste Time, the standard time observed in East Timor.
-
C.
LTL
LTL is the former official currency code for the Lithuanian litas, which was replaced by the euro in 2015.
-
D.
LTL
LTL is the National Rail station code for Littleborough railway station in Greater Manchester, England.
-
E.
Lt
Lt is the standard military abbreviation for the commissioned officer rank of Lieutenant in the Australian Army.
- F. None of above. chosen
Statements (47)
| Predicate | Object |
|---|---|
| instanceOf |
cosmological model
ⓘ
exact solution of Einstein's field equations ⓘ gravitational collapse model ⓘ inhomogeneous dust solution ⓘ spherically symmetric spacetime metric ⓘ |
| allows |
radial dependence of density
ⓘ
radial dependence of expansion rate ⓘ |
| assumes |
comoving coordinates for dust particles
ⓘ
dust matter with zero pressure ⓘ spherical symmetry ⓘ |
| basedOn | Einstein's field equations NERFINISHED ⓘ |
| belongsTo | general relativity ⓘ |
| describes |
pressureless matter (dust) distribution
ⓘ
radially inhomogeneous cosmological models ⓘ spherically symmetric inhomogeneous dust-filled universe ⓘ |
| fullName | Lemaître–Tolman–Bondi metric NERFINISHED ⓘ |
| generalizes | Friedmann–Lemaître–Robertson–Walker metric NERFINISHED ⓘ |
| hasApplication |
relativistic astrophysics
ⓘ
theoretical cosmology ⓘ |
| hasCoordinateSystem | comoving synchronous coordinates ⓘ |
| hasSymmetry | spherical symmetry ⓘ |
| includes |
bang time function
ⓘ
energy (curvature) function ⓘ radial mass function ⓘ |
| is | radially inhomogeneous generalization of FLRW models ⓘ |
| matterContent | pressureless dust ⓘ |
| metricSignature | Lorentzian ⓘ |
| namedAfter |
Georges Lemaître
NERFINISHED
ⓘ
Hermann Bondi NERFINISHED ⓘ Richard C. Tolman NERFINISHED ⓘ |
| reducesTo | FLRW metric for homogeneous density and curvature ⓘ |
| solves | Einstein equations with dust stress–energy tensor ⓘ |
| spacetimeDimension | 4 ⓘ |
| timeCoordinate | proper time of comoving dust observers ⓘ |
| usedFor |
gravitational lensing in inhomogeneous backgrounds
ⓘ
modeling Oppenheimer–Snyder-like collapse generalizations ⓘ modeling cosmic voids ⓘ modeling inhomogeneous Big Bang times ⓘ studying apparent cosmic acceleration without dark energy ⓘ studying light propagation in inhomogeneous universes ⓘ testing Copernican principle ⓘ |
| usedIn |
cosmology
ⓘ
gravitational collapse studies ⓘ inhomogeneous cosmological models ⓘ relativistic stellar collapse modeling ⓘ studies of structure formation ⓘ void models of cosmic acceleration ⓘ |
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: LTB metric Description of subject: The LTB metric is an exact solution of Einstein’s field equations describing a spherically symmetric, inhomogeneous dust-filled universe used in cosmology and gravitational collapse studies.
Referenced by (1)
Full triples — surface form annotated when it differs from this entity's canonical label.