Pith Number

pith:ZN3V4OT7

pith:2016:ZN3V4OT7CJB73SABGKVB3UGFQP

not attested not anchored not stored refs pending

Constraint on a cosmological variation in the proton-to-electron mass ratio from electronic CO absorption

E. J. Salumbides, M. Dapr\`a, M. L. Niu, M. T. Murphy, W. Ubachs

arxiv:1605.09742 v1 · 2016-05-31 · astro-ph.CO · astro-ph.GA

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZN3V4OT7CJB73SABGKVB3UGFQP}

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	2026-05-18T01:08:40.771490Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cb775e3a7f1243fdc80132aa1dd0c583d0a4736cb27d2bdd927837fc7b31c166

Aliases

arxiv: 1605.09742 · arxiv_version: 1605.09742v1 · doi: 10.48550/arxiv.1605.09742 · pith_short_12: ZN3V4OT7CJB7 · pith_short_16: ZN3V4OT7CJB73SAB · pith_short_8: ZN3V4OT7

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/ZN3V4OT7CJB73SABGKVB3UGFQP \
  | 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: cb775e3a7f1243fdc80132aa1dd0c583d0a4736cb27d2bdd927837fc7b31c166

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "363bd872f134a6b38047911c33124e9c35d4f6e41a129134ed4ec4f7b9e07a45",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2016-05-31T17:55:27Z",
    "title_canon_sha256": "ae6eeb75e8a9c126061ef0fb8f047aa4a171e77cac014baf46187f6c750bf8d6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1605.09742",
    "kind": "arxiv",
    "version": 1
  }
}