Pith Number

pith:PNWUO5T6

pith:2016:PNWUO5T675BAUV2IEEOUGLDSS5

not attested not anchored not stored refs pending

Precise limits on cosmological variability of the fine-structure constant with zinc and chromium quasar absorption lines

(2) University of California, Adrian L. Malec (1), J. Xavier Prochaska (2) ((1) Swinburne University of Technology, Michael T. Murphy (1), Santa Cruz)

arxiv:1606.06293 v2 · 2016-06-20 · astro-ph.CO · 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{PNWUO5T675BAUV2IEEOUGLDSS5}

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

Colloquium: Radio astronomy with the Arecibo 305-m telescope: In contemporaneous context

Receipt and verification

First computed	2026-05-18T01:03:26.270877Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7b6d47767eff420a5748211d432c72977c4fb0ee06cd58b5221e41e503abf206

Aliases

arxiv: 1606.06293 · arxiv_version: 1606.06293v2 · doi: 10.48550/arxiv.1606.06293 · pith_short_12: PNWUO5T675BA · pith_short_16: PNWUO5T675BAUV2I · pith_short_8: PNWUO5T6

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/PNWUO5T675BAUV2IEEOUGLDSS5 \
  | 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: 7b6d47767eff420a5748211d432c72977c4fb0ee06cd58b5221e41e503abf206

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "96760eb2fb92af26b74d00c7f8bde91b3320276978a94a439b14cbd0794c5fd2",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph",
      "hep-th",
      "physics.atom-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2016-06-20T20:00:02Z",
    "title_canon_sha256": "2907b953c362ed70fea8b1450a78f81f2ca82b147a963fec18aa639cac8610db"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1606.06293",
    "kind": "arxiv",
    "version": 2
  }
}