Pith Number

pith:VRWONIWX

pith:2000:VRWONIWXXIROWHC2QFSQMWARRD

not attested not anchored not stored refs pending

Further Evidence for Cosmological Evolution of the Fine Structure Constant

A.M. Wolfe, C.W. Churchill, J.D. Barrow, J.K. Webb, J.X. Prochaska, M.T. Murphy, V.A. Dzuba, V.V. Flambaum

arxiv:astro-ph/0012539 v3 · 2000-12-29 · astro-ph · gr-qc · hep-ph · hep-th · physics.atom-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VRWONIWXXIROWHC2QFSQMWARRD}

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

Dilaton-induced variations in Planck constant and speed of light: An alternative to Dark Energy

Receipt and verification

First computed	2026-07-04T15:20:39.079387Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac6ce6a2d7ba22eb1c5a816506581188f5f285df195c66d78a29bfb978dc6d12

Aliases

arxiv: astro-ph/0012539 · arxiv_version: astro-ph/0012539v3 · doi: 10.48550/arxiv.astro-ph/0012539 · pith_short_12: VRWONIWXXIRO · pith_short_16: VRWONIWXXIROWHC2 · pith_short_8: VRWONIWX

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/VRWONIWXXIROWHC2QFSQMWARRD \
  | 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: ac6ce6a2d7ba22eb1c5a816506581188f5f285df195c66d78a29bfb978dc6d12

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b424306ca1a0a856206f6767b73cf14d53ce095f15c5a044f4e2bf567aa50675",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th",
      "physics.atom-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-12-29T16:22:11Z",
    "title_canon_sha256": "4f7a2bb0616960f145c190627d94e12eb32e49a0613c1e0f6b80862dd195cb56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0012539",
    "kind": "arxiv",
    "version": 3
  }
}