Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links
Paper Citation Record · LEDGER
As of 10 August 2026, this Paper Citation Record lists 0 of 0 outbound references and 4 inbound Pith citation observations for arXiv:2109.04229.
A citation records a reference. It does not transfer a finding from one paper to another.
Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links
One-hop event checks from named stored sources.
Source: scholarly_work_events, retraction_status_cache, observed 2026-08-10T06:31:04.303077+00:00
Pith citing papers itemized under the disclosed page cap.
Source: paper_references, paper_reference_links, observed 2026-08-07T19:55:20.548419Z
A source-named dated measurement, never combined with another source.
Source: arxiv_reference, observed 2026-05-13T22:58:23.924086Z
0 of 0 outbound references displayed
External citation measurements
No source-named external measurement is stored.
No outbound reference observations are available for this paper version.
Observation 8e1636ba-832f-4541-b224-54069a97e359 · inbound
Complex degenerate metrics in general relativity: a covariant extension of the Moore-Penrose algorithm Regularized big bang singularity: Geodesic congruences
Reference 33
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation dbc7fc89-ef95-4dde-836b-46230e438381 · inbound
Brane Symmetries Revisited: Symmetries of Tensile and Tensionless Branes in Possibly Degenerate Metrics and their Manifestations Regularized big bang singularity: Geodesic congruences
Reference 39
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 0c7837ae-b4b2-49e1-b064-6c6428e44a10 · inbound
Big Bang revisited Regularized big bang singularity: Geodesic congruences
Reference 15
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.
Observation 4eedd0a5-777a-41c0-ad98-f5c0a2dc7177 · inbound
Energy conditions in static, spherically symmetric spacetimes and effective geometries Regularized big bang singularity: Geodesic congruences
Reference 68
Source-reported events for the cited work
No event found in the named queried sources as of 2026-08-10T06:31:04.303077+00:00.