Pith Number

pith:4DNDKL7H

pith:2015:4DNDKL7HQ5ESH6EYW6FPMY2GTQ

not attested not anchored not stored refs pending

Constraint on the time variation of the fine-structure constant with the SDSS-III/BOSS DR12 quasar sample

Arturo Manchado, Carlos M. Guti\'errez, D.A. Garc\'ia-Hern\'andez, David Schlegel, Donald P. Schneider, Francisco Prada, Franco D. Albareti, Isabelle P\^aris, Jian Ge, Johan Comparat, Mart\'in L\'opez-Corredoira, Patrick Petitjean

arxiv:1501.00560 v2 · 2015-01-03 · astro-ph.CO · hep-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{4DNDKL7HQ5ESH6EYW6FPMY2GTQ}

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	2026-05-18T01:35:20.515236Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e0da352fe7874923f898b78af663469c358a17b88c2bba5494c1b4cf247fdff4

Aliases

arxiv: 1501.00560 · arxiv_version: 1501.00560v2 · doi: 10.48550/arxiv.1501.00560 · pith_short_12: 4DNDKL7HQ5ES · pith_short_16: 4DNDKL7HQ5ESH6EY · pith_short_8: 4DNDKL7H

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/4DNDKL7HQ5ESH6EYW6FPMY2GTQ \
  | 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: e0da352fe7874923f898b78af663469c358a17b88c2bba5494c1b4cf247fdff4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a4231c418a48a78943ee9f12de080079c6e4bac1c7e8dc2f0a2cb15fca3e477b",
    "cross_cats_sorted": [
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2015-01-03T13:06:01Z",
    "title_canon_sha256": "e205a222e1261a946987916b527dcca9b8441fc494a5fbe59a34441d5eb4806e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1501.00560",
    "kind": "arxiv",
    "version": 2
  }
}