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Paper Citation Record · LEDGER

Exact vacuum solution with Hopf structure in general relativity

As of 11 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.

pith.paper-citation-record.v1
2506.20878 v1

Coverage vector

measured 10 of 10 reference resolution

Typed states for the displayed outbound observations.

Source: paper_references, paper_reference_links, observed 2026-08-06T22:53:31.505501Z

measured 11 of 11 standing notices

One-hop event checks from named stored sources.

Source: scholarly_work_events, retraction_status_cache, observed 2026-08-11T06:34:44.6726+00:00

measured 1 of 1 inbound itemization

Pith citing papers itemized under the disclosed page cap.

Source: paper_references, paper_reference_links, observed 2026-08-06T15:28:43.031605Z

measured 0 of 1 external citation measurements

A source-named dated measurement, never combined with another source.

Source: pith, observed 2026-08-06T15:28:43.952080Z

Reference resolution

10 of 10 outbound references displayed

  • verified exact2
  • verified fuzzy3
  • unresolved5
  • parse uncertain0
  • malformed identifier0
  • metadata mismatch0

External citation measurements

No source-named external measurement is stored.

Outbound references

Observation 32d58c36-2e18-4ca5-ada8-4f9a0b4332e8 · outbound

This paper cites Hopf, Über die abbildungen der dreidimensionalen sphäre auf die kugelfläche, Math.

Exact vacuum solution with Hopf structure in general relativity Hopf, Über die abbildungen der dreidimensionalen sphäre auf die kugelfläche, Math

Reference 1

Resolution
verified fuzzy
raw_fallback, observed 2026-08-06T22:53:33.279664Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.

source=pdf_text observed=2026-08-06T22:53:30.505931Z digest=sha256:3181950b576d7b661f66c1be017e6336cebec72f57f26998bc74945547b174c9

Observation a1397deb-a30e-4ad1-a7df-eddb251a59d6 · outbound

This paper cites Urbantke, The Hopf fibration—seven times in physics, J.

Exact vacuum solution with Hopf structure in general relativity Urbantke, The Hopf fibration—seven times in physics, J

Reference 2

Resolution
verified fuzzy
raw_fallback, observed 2026-08-06T22:53:33.035271Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.

source=pdf_text observed=2026-08-06T22:53:30.573980Z digest=sha256:4545bc0c28a19998fb46dba8ae9daccd621a03c6aa1f44974adc5beef9240be7

Observation dca2ce5b-65e3-4feb-ab45-3a7799a4d95e · outbound

This paper cites an unresolved cited work.

Exact vacuum solution with Hopf structure in general relativity Unresolved cited work

Reference 3

Resolution
unresolved
raw_fallback, observed 2026-08-06T22:53:32.682753Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.

source=pdf_text observed=2026-08-06T22:53:30.658637Z digest=sha256:a1caddd9f3098dc5af503f892c738308b43e4e1ead3a93ebdb1e9862adb01d52

Observation 63c49ea2-a8b6-4363-b0e7-426b5ebd02de · outbound

This paper cites Tying knots in light fields.

Exact vacuum solution with Hopf structure in general relativity Tying knots in light fields

Reference 4

Resolution
verified exact
local_arxiv, observed 2026-08-06T22:53:32.087829Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.

source=pdf_text observed=2026-08-06T22:53:30.796814Z digest=sha256:26fe8849828ba132e72e9ebf380163e1501c7201aaaa517331e0dee7b939be87

Observation eb2c83a2-cee1-4da6-b3b9-7c390420e94d · outbound

This paper cites Simple description of generalized electromagnetic and gravitational hopfions.

Exact vacuum solution with Hopf structure in general relativity Simple description of generalized electromagnetic and gravitational hopfions

Reference 5

Resolution
verified exact
local_arxiv, observed 2026-08-06T22:53:31.831053Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.

source=pdf_text observed=2026-08-06T22:53:30.927905Z digest=sha256:e2d50c6e32df1f29183ce0c140f3cf7c3423a413afa6777644d557fee8943ef2

Observation 57cd077f-4ae6-40e6-ac58-7fa52ff16903 · outbound

This paper cites Anti-Self-Dual Spacetimes, Gravitational Instantons and Knotted Zeros of the Weyl Tensor.

Exact vacuum solution with Hopf structure in general relativity Anti-Self-Dual Spacetimes, Gravitational Instantons and Knotted Zeros of the Weyl Tensor

Reference 6

Resolution
unresolved
no resolver link, observed 2026-08-06T22:53:30.987093Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

source=pdf_text observed=2026-08-06T22:53:30.987093Z digest=sha256:e85a0563bc2a3893edfae95bead1a07180b6bce4df51998642a7b4c06ebaa365

Observation 968b6d8f-1086-453a-8d6a-b502a3515cb1 · outbound

This paper cites an unresolved cited work.

Exact vacuum solution with Hopf structure in general relativity Unresolved cited work

Reference 7

Resolution
unresolved
no resolver link, observed 2026-08-06T22:53:31.087951Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

source=pdf_text observed=2026-08-06T22:53:31.087951Z digest=sha256:fd8d1d6a68ed23694238cf709856c893816324f09e3780a45fd1d18dfc1ec3b5

Observation e234b6f2-fde5-4ac4-8e14-2e8adac41b76 · outbound

This paper cites an unresolved cited work.

Exact vacuum solution with Hopf structure in general relativity Unresolved cited work

Reference 8

Resolution
unresolved
no resolver link, observed 2026-08-06T22:53:31.217565Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

source=pdf_text observed=2026-08-06T22:53:31.217565Z digest=sha256:ef039e373c1315ab1a37695b83d7dff61e4ab378d02555f260f45b98763afd7c

Observation 138776fb-ae25-42cb-98f5-3fb30cbc404e · outbound

This paper cites Second Order Scalar Invariants of the Riemann Tensor: Applications to Black Hole Spacetimes.

Exact vacuum solution with Hopf structure in general relativity Second Order Scalar Invariants of the Riemann Tensor: Applications to Black Hole Spacetimes

Reference 9

Resolution
unresolved
no resolver link, observed 2026-08-06T22:53:31.384401Z

Source-reported events for the cited work

Unavailable: canonical work link unavailable.

source=pdf_text observed=2026-08-06T22:53:31.384401Z digest=sha256:52927b976ff0109502ea30dcc9a85d0c92da8a2c519a18d84533921c9a91c4ce

Observation 3b7d980c-2441-4ea0-839a-7ea84d3b965b · outbound

This paper cites Stephani, D.

Exact vacuum solution with Hopf structure in general relativity Stephani, D

Reference 10

Resolution
verified fuzzy
raw_fallback, observed 2026-08-06T22:53:32.355724Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.

source=pdf_text observed=2026-08-06T22:53:31.505501Z digest=sha256:8c7f02550ff0bd20f98cb041465c09006209b621e1c538768c184706caf7650b

Pith citing papers

Observation bfddb3cc-e589-4c80-94d3-1c5064a69953 · inbound

Ultrarelativistic limit of the Kerr theorem cites this paper.

Ultrarelativistic limit of the Kerr theorem Exact vacuum solution with Hopf structure in general relativity

Reference 12

Resolution
verified exact
local_arxiv, observed 2026-08-06T15:28:44.087400Z

Source-reported events for the cited work

No event found in the named queried sources as of 2026-08-11T06:34:44.6726+00:00.

source=pdf_text observed=2026-08-06T15:28:43.031605Z digest=sha256:e4039543c8ab6df5cfda591be643565da49bbc37ee76c3e8101301f7bef6cb81