Typed states for the displayed outbound observations.
Source: paper_references, paper_reference_links, observed 2026-08-06T22:53:31.505501Z
Paper Citation Record · LEDGER
As of 10 August 2026, this Paper Citation Record lists 10 of 10 outbound references and 1 inbound Pith citation observation for arXiv:2506.20878.
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, observed 2026-08-06T22:53:31.505501Z
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 2026-08-06T15:28:43.031605Z
A source-named dated measurement, never combined with another source.
Source: pith, observed 2026-08-06T15:28:43.952080Z
10 of 10 outbound references displayed
External citation measurements
No source-named external measurement is stored.
Observation 32d58c36-2e18-4ca5-ada8-4f9a0b4332e8 · outbound
Exact vacuum solution with Hopf structure in general relativity Hopf, Über die abbildungen der dreidimensionalen sphäre auf die kugelfläche, Math
Reference 1
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 a1397deb-a30e-4ad1-a7df-eddb251a59d6 · outbound
Exact vacuum solution with Hopf structure in general relativity Urbantke, The Hopf fibration—seven times in physics, J
Reference 2
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 dca2ce5b-65e3-4feb-ab45-3a7799a4d95e · outbound
Exact vacuum solution with Hopf structure in general relativity Unresolved cited work
Reference 3
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 63c49ea2-a8b6-4363-b0e7-426b5ebd02de · outbound
Exact vacuum solution with Hopf structure in general relativity Tying knots in light fields
Reference 4
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 eb2c83a2-cee1-4da6-b3b9-7c390420e94d · outbound
Exact vacuum solution with Hopf structure in general relativity Simple description of generalized electromagnetic and gravitational hopfions
Reference 5
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 57cd077f-4ae6-40e6-ac58-7fa52ff16903 · outbound
Exact vacuum solution with Hopf structure in general relativity Anti-Self-Dual Spacetimes, Gravitational Instantons and Knotted Zeros of the Weyl Tensor
Reference 6
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 968b6d8f-1086-453a-8d6a-b502a3515cb1 · outbound
Exact vacuum solution with Hopf structure in general relativity Unresolved cited work
Reference 7
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation e234b6f2-fde5-4ac4-8e14-2e8adac41b76 · outbound
Exact vacuum solution with Hopf structure in general relativity Unresolved cited work
Reference 8
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 138776fb-ae25-42cb-98f5-3fb30cbc404e · outbound
Exact vacuum solution with Hopf structure in general relativity Second Order Scalar Invariants of the Riemann Tensor: Applications to Black Hole Spacetimes
Reference 9
Source-reported events for the cited work
Unavailable: canonical work link unavailable.
Observation 3b7d980c-2441-4ea0-839a-7ea84d3b965b · outbound
Exact vacuum solution with Hopf structure in general relativity Stephani, D
Reference 10
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 bfddb3cc-e589-4c80-94d3-1c5064a69953 · inbound
Ultrarelativistic limit of the Kerr theorem Exact vacuum solution with Hopf structure in general relativity
Reference 12
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.