Pith Number

pith:BWDCBT2D

pith:2003:BWDCBT2D4WSNRJQ2QKPHW4CCQB

not attested not anchored not stored refs pending

New varying speed of light theories

Joao Magueijo

arxiv:astro-ph/0305457 v3 · 2003-05-23 · astro-ph · gr-qc · hep-ph · hep-th

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BWDCBT2D4WSNRJQ2QKPHW4CCQB}

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

The Confrontation between General Relativity and Experiment

Receipt and verification

First computed	2026-07-04T15:29:18.031551Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0d8620cf43e5a4d8a61a829e7b704280629da245025dfc23a3da180ede057359

Aliases

arxiv: astro-ph/0305457 · arxiv_version: astro-ph/0305457v3 · doi: 10.48550/arxiv.astro-ph/0305457 · pith_short_12: BWDCBT2D4WSN · pith_short_16: BWDCBT2D4WSNRJQ2 · pith_short_8: BWDCBT2D

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/BWDCBT2D4WSNRJQ2QKPHW4CCQB \
  | 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: 0d8620cf43e5a4d8a61a829e7b704280629da245025dfc23a3da180ede057359

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fcacd8b2f6422b541c5fcde803eadd97f0ac7e48f0eccead41992322df186296",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-05-23T11:23:42Z",
    "title_canon_sha256": "2017a0d2381bd376b05ac472986a03c01d36997365822542b09f695a2c5143bc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0305457",
    "kind": "arxiv",
    "version": 3
  }
}