Pith Number

pith:KQ2HAVZA

pith:1998:KQ2HAVZALV64NKPV7TPII7QSTI

not attested not anchored not stored refs pending

A time varying speed of light as a solution to cosmological puzzles

Andreas Albrecht, Joao Magueijo

arxiv:astro-ph/9811018 v2 · 1998-11-02 · astro-ph · gr-qc · 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{KQ2HAVZALV64NKPV7TPII7QSTI}

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.

Receipt and verification

First computed	2026-07-04T17:25:53.192139Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

54347057205d7dc6a9f5fcde847e129a2cebb5d693ab8336a1985537b35be2ca

Aliases

arxiv: astro-ph/9811018 · arxiv_version: astro-ph/9811018v2 · doi: 10.48550/arxiv.astro-ph/9811018 · pith_short_12: KQ2HAVZALV64 · pith_short_16: KQ2HAVZALV64NKPV · pith_short_8: KQ2HAVZA

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/KQ2HAVZALV64NKPV7TPII7QSTI \
  | 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: 54347057205d7dc6a9f5fcde847e129a2cebb5d693ab8336a1985537b35be2ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7df62f7ed5013fe950bdcf8b7951dd1875559f2d068ece6196012b0f5324fd3d",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-11-02T13:35:40Z",
    "title_canon_sha256": "e31413d277df864947809bff3cc688bd54af102d02716c7d13c9c25acc19ddab"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9811018",
    "kind": "arxiv",
    "version": 2
  }
}