Pith Number

pith:YA7MIPLU

pith:2013:YA7MIPLUQ5VYSRCNSJBHJLNJL7

not attested not anchored not stored refs pending

Limits on the dependence of the fine-structure constant on gravitational potential from white-dwarf spectra

A. Ong, J. B. Holberg, J. C. Berengut, J. K. Webb, John D. Barrow, M. A. Barstow, S. P. Preval, V. V. Flambaum

arxiv:1305.1337 v2 · 2013-05-06 · astro-ph.CO · gr-qc · 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{YA7MIPLUQ5VYSRCNSJBHJLNJL7}

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	2026-05-18T03:19:01.049515Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c03ec43d74876b89444d924274ada95fc81e65578b022d653dab12ba4dbeec20

Aliases

arxiv: 1305.1337 · arxiv_version: 1305.1337v2 · doi: 10.48550/arxiv.1305.1337 · pith_short_12: YA7MIPLUQ5VY · pith_short_16: YA7MIPLUQ5VYSRCN · pith_short_8: YA7MIPLU

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/YA7MIPLUQ5VYSRCNSJBHJLNJL7 \
  | 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: c03ec43d74876b89444d924274ada95fc81e65578b022d653dab12ba4dbeec20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0b53ecbfa109474376fd7e680114e99b7b3032f91999e55d7559506796a10e78",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-th",
      "physics.atom-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2013-05-06T21:45:23Z",
    "title_canon_sha256": "b0192bf04ae48f0c7bc232fe0fa5e38670c246ec074375007c82b85ea8792bcc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1305.1337",
    "kind": "arxiv",
    "version": 2
  }
}