Pith Number

pith:DHDZHUZJ

pith:1998:DHDZHUZJH7T24ENQYA2IRDU6TZ

not attested not anchored not stored refs pending

Cosmologies with Varying Light-Speed

John D. Barrow

arxiv:astro-ph/9811022 v1 · 1998-11-02 · astro-ph · 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{DHDZHUZJH7T24ENQYA2IRDU6TZ}

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	2026-07-04T16:07:09.495786Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

19c793d3293fe7ae11b0c034888e9e9e681033696189d2f01b4d3bf23d98b6e5

Aliases

arxiv: astro-ph/9811022 · arxiv_version: astro-ph/9811022v1 · doi: 10.48550/arxiv.astro-ph/9811022 · pith_short_12: DHDZHUZJH7T2 · pith_short_16: DHDZHUZJH7T24ENQ · pith_short_8: DHDZHUZJ

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/DHDZHUZJH7T24ENQYA2IRDU6TZ \
  | 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: 19c793d3293fe7ae11b0c034888e9e9e681033696189d2f01b4d3bf23d98b6e5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "aa077aec3e2617c03c4e1d4c391dbe8eb05ea88355931ef23b69ec88dbc376ec",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1998-11-02T16:04:29Z",
    "title_canon_sha256": "a9c901c5cac3ee8228352ef39b0b19a01533627a350d958aba83ed01f30bc3f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9811022",
    "kind": "arxiv",
    "version": 1
  }
}