Pith Number

pith:B6ACUJS4

pith:2003:B6ACUJS4HEM63XIRPF3YUQFD5S

not attested not anchored not stored refs pending

Varying Alpha in a More Realistic Universe

Cambridge Univ.), D. F. Mota (DAMTP, J. D. Barrow (DAMTP

arxiv:astro-ph/0306047 v3 · 2003-06-02 · 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{B6ACUJS4HEM63XIRPF3YUQFD5S}

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	2026-05-18T04:23:00.918919Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0f802a265c3919eddd1179778a40a3ec9ddc7defbe9defd7b9f86ae23535a623

Aliases

arxiv: astro-ph/0306047 · arxiv_version: astro-ph/0306047v3 · doi: 10.48550/arxiv.astro-ph/0306047 · pith_short_12: B6ACUJS4HEM6 · pith_short_16: B6ACUJS4HEM63XIR · pith_short_8: B6ACUJS4

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/B6ACUJS4HEM63XIRPF3YUQFD5S \
  | 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: 0f802a265c3919eddd1179778a40a3ec9ddc7defbe9defd7b9f86ae23535a623

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "de2f5125e1ba964bf2945399b5298431b6c74cc7ec526f0d623bc417c55cf302",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2003-06-02T20:06:43Z",
    "title_canon_sha256": "e50efced55702766c2a17eb214079d8448bc47c723f9ac2b90474b09567cdac4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0306047",
    "kind": "arxiv",
    "version": 3
  }
}