Pith Number

pith:NB264YIK

pith:2003:NB264YIKMANLAVIDEHASFW3CST

not attested not anchored not stored refs pending

Variation of the speed of light due to non-minimal coupling between electromagnetism and gravity

Pierre Teyssandier

arxiv:gr-qc/0303081 v3 · 2003-03-20 · gr-qc

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NB264YIKMANLAVIDEHASFW3CST}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Cited by

1 paper in Pith

Revisiting Varying Speed of Light in Cosmology: Insights from the Friedmann-Lema\^itre-Robertson-Walker Metric

Receipt and verification

First computed	2026-07-04T14:25:39.720700Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6875ee610a601ab0550321c122db6294e7b0b5b6e462ec7cd858e64298056103

Aliases

arxiv: gr-qc/0303081 · arxiv_version: gr-qc/0303081v3 · doi: 10.48550/arxiv.gr-qc/0303081 · pith_short_12: NB264YIKMANL · pith_short_16: NB264YIKMANLAVID · pith_short_8: NB264YIK

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/NB264YIKMANLAVIDEHASFW3CST \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 6875ee610a601ab0550321c122db6294e7b0b5b6e462ec7cd858e64298056103

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c161afc0e1a28ac736c77717be13f799db21a6d5041f6b1a89fe7e47f7b29b1c",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "gr-qc",
    "submitted_at": "2003-03-20T17:23:37Z",
    "title_canon_sha256": "175199e2a34f6b3c19a509114ffe338b6b932cdb530b22fa9598a2ecc222647d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "gr-qc/0303081",
    "kind": "arxiv",
    "version": 3
  }
}