Pith Number

pith:JTL3HT62

pith:1999:JTL3HT62FS5RK2FMM553LN54EK

not attested not anchored not stored refs pending

Spatial Variations of Fundamental Constants

Chris O'Toole, John D. Barrow

arxiv:astro-ph/9904116 v1 · 1999-04-09 · 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{JTL3HT62FS5RK2FMM553LN54EK}

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	2026-07-04T16:10:52.716363Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4cd7b3cfda2cbb1568ac677bb5b7bc22bc4e75da9bb0de9ddd8a397d95674d43

Aliases

arxiv: astro-ph/9904116 · arxiv_version: astro-ph/9904116v1 · doi: 10.48550/arxiv.astro-ph/9904116 · pith_short_12: JTL3HT62FS5R · pith_short_16: JTL3HT62FS5RK2FM · pith_short_8: JTL3HT62

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/JTL3HT62FS5RK2FMM553LN54EK \
  | 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: 4cd7b3cfda2cbb1568ac677bb5b7bc22bc4e75da9bb0de9ddd8a397d95674d43

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "20d3700b68bc0ac99556470b892c35e0634c9ce86bb3ebd086201a8d4bdd6824",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "1999-04-09T14:20:25Z",
    "title_canon_sha256": "65f8610dbb234271ec31f5dca556bbaf2496422c408078dfa351060de2f6cbd6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/9904116",
    "kind": "arxiv",
    "version": 1
  }
}