Wikimedia neighborhood · Wikidata observation Observed Graph-projection

Friedmann equations

set of ordinary differential equations governing cosmic expansion in a homogeneous and isotropic universe

Provider: Wikidata. These recorded connections are observations, not Counterpedia claims. They do not establish source support.

Data and provenance

Provider: Wikidata · Entity ID: Q467736

Release: sha256:f33228901a35b0683356002a46df9ceb11f399d05f17abb5c7c78256cbf38ba7

Graph membership is not truth. Each relation below is an observed typed edge the local Wikimedia graph bundle already materialized — not a corroborated, verified, or admitted claim. Bounded to 40 relations via an offset-index lookup (offset_index_binary_search), never a full scan of the bundle.Serving a published subset: joined entities + 1-hop neighborhood of 35,994 exact Wikipedia–Wikidata title matches. A subject that is not itself in that subset carries only the relations the subset recorded for it, so a small count here is the published scope and not a complete relationship inventory.

Development requests are not available on this deployment. The observed entity and its graph links remain readable.

1-hop relations (13)

Observed adjacency only. Each spoke is a typed edge already materialized in the graph, labeled by its recorded predicate — graph proximity is not support, corroboration, or admission. The links below are the accessible, no-JavaScript path to the same neighbors.

Follow a connection

Grouped by a fixed presentation taxonomy for legibility only. The grouping asserts no rank, truth, support, or standing — every observed edge is carried, none reordered by importance.

Identity & relations (1)

→ instance of (P31)system of differential equationsObserved
Relationship details
Provider: Wikidata · Property: P31 · Direction: outgoing · Entity ID: Q96407346

Notable works (1)

← notable work (P800)Alexander FriedmannObserved
Relationship details
Provider: Wikidata · Property: P800 · Direction: incoming · Entity ID: Q205981

Other connections (11)

→ Relationship name unavailable (P7235)\LambdaObserved
Relationship details
Provider: Wikidata · Property: P7235 · Direction: outgoing
→ Relationship name unavailable (P7235)aObserved
Relationship details
Provider: Wikidata · Property: P7235 · Direction: outgoing
→ Relationship name unavailable (P61)Alexander FriedmannObserved
Relationship details
Provider: Wikidata · Property: P61 · Direction: outgoing · Entity ID: Q205981
→ Relationship name unavailable (P2534)\begin{aligned}(\dot a/a)^2&=\frac{8\pi G\rho}3-\frac k{R^2}+\frac13\Lambda\\\ddot a/a&=\frac13\Lambda-\frac{4\pi G}3(1+3w)\rho\end{aligned}Observed
Relationship details
Provider: Wikidata · Property: P2534 · Direction: outgoing
→ Relationship name unavailable (P7235)\rhoObserved
Relationship details
Provider: Wikidata · Property: P7235 · Direction: outgoing
→ part of (P361)Friedmann universeObserved
Relationship details
Provider: Wikidata · Property: P361 · Direction: outgoing · Entity ID: Q3859858
→ Relationship name unavailable (P7235)GObserved
Relationship details
Provider: Wikidata · Property: P7235 · Direction: outgoing
→ Relationship name unavailable (P443)LL-Q9610 (ben)-Tahmid-ফ্রিদমান সমীকরণ.wavObserved
Relationship details
Provider: Wikidata · Property: P443 · Direction: outgoing
→ named after (P138)Alexander FriedmannObserved
Relationship details
Provider: Wikidata · Property: P138 · Direction: outgoing · Entity ID: Q205981
→ Relationship name unavailable (P7235)\dot a/aObserved
Relationship details
Provider: Wikidata · Property: P7235 · Direction: outgoing
→ Relationship name unavailable (P7235)wObserved
Relationship details
Provider: Wikidata · Property: P7235 · Direction: outgoing

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