Pith Number

pith:DAGAOYEY

pith:2007:DAGAOYEYYY4QDSQPMVF2YD7JHZ

not attested not anchored not stored refs pending

Comment on "Limits on the Time Variation of the Electromagnetic Fine-Structure Constant in the Low Energy Limit from Absorption Lines in the Spectra of Distant Quasars"

2), (2) Institute of Astronomy, (3) University of New South Wales, John K. Webb (3), Melbourne, Michael T. Murphy (1, Sydney), University of Cambridge, Victor V. Flambaum (3) ((1) Swinburne University of Technology

arxiv:0708.3677 v2 · 2007-08-27 · astro-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{DAGAOYEYYY4QDSQPMVF2YD7JHZ}

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	2026-07-04T15:44:30.499737Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

180c076098c63901ca0f654bac0fe93e552d9af8ff597988138bd3162b3048ec

Aliases

arxiv: 0708.3677 · arxiv_version: 0708.3677v2 · doi: 10.48550/arxiv.0708.3677 · pith_short_12: DAGAOYEYYY4Q · pith_short_16: DAGAOYEYYY4QDSQP · pith_short_8: DAGAOYEY

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/DAGAOYEYYY4QDSQPMVF2YD7JHZ \
  | 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: 180c076098c63901ca0f654bac0fe93e552d9af8ff597988138bd3162b3048ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5ee69b93f29443e7591da23be3c8a0670a31210f54bc42da7ba51a6023ffc2ee",
    "cross_cats_sorted": [
      "hep-th",
      "physics.atom-ph"
    ],
    "license": "",
    "primary_cat": "astro-ph",
    "submitted_at": "2007-08-27T20:08:17Z",
    "title_canon_sha256": "e394ce2fdbb455400b7fcc2ec0c9eeda8ed28d403d2793c61a4122da19565fb6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0708.3677",
    "kind": "arxiv",
    "version": 2
  }
}