Pith Number

pith:ZRJZIRLC

pith:2000:ZRJZIRLCZDUJCWTHWH23JZJKYR

not attested not anchored not stored refs pending

Possible evidence for a variable fine structure constant from QSO absorption lines: motivations, analysis and results

A. M. Wolfe (UCSD), C. W. Churchill (PSU), J. D. Barrow (DAMTP), J. K. Webb (UNSW), J. X. Prochaska (OCIW), M. T. Murphy (UNSW), V. A. Dzuba (UNSW), V. V. Flambaum (UNSW)

arxiv:astro-ph/0012419 v5 · 2000-12-20 · astro-ph · gr-qc · hep-th · nucl-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{ZRJZIRLCZDUJCWTHWH23JZJKYR}

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

2 papers in Pith

Running Vacuum in the expanding Universe: a unified QFT paradigm for Inflation and Dark Energy

The Confrontation between General Relativity and Experiment

Receipt and verification

First computed	2026-07-04T15:20:39.042230Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cc53944562c8e8915a67b1f5b4e52ac457af4b86092b24ecdb7190c6f5c0f976

Aliases

arxiv: astro-ph/0012419 · arxiv_version: astro-ph/0012419v5 · doi: 10.48550/arxiv.astro-ph/0012419 · pith_short_12: ZRJZIRLCZDUJ · pith_short_16: ZRJZIRLCZDUJCWTH · pith_short_8: ZRJZIRLC

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/ZRJZIRLCZDUJCWTHWH23JZJKYR \
  | 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: cc53944562c8e8915a67b1f5b4e52ac457af4b86092b24ecdb7190c6f5c0f976

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb7dc5dcae625281e14c4fe07e6017e52aaa3bb66c55e4a60d1a85f62f29d059",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th",
      "nucl-th",
      "physics.atom-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2000-12-20T22:50:04Z",
    "title_canon_sha256": "514a0a500f99756b2ede19357c4cb55bd8d0613030571cb67d5aba3e724e518a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "astro-ph/0012419",
    "kind": "arxiv",
    "version": 5
  }
}