Pith Number

pith:EGNGKGNH

pith:2014:EGNGKGNHFCFEFD62E2UYRPZ424

not attested not anchored not stored refs pending

Constraints on changes in the proton-electron mass ratio using methanol lines

(2) VU University Amsterdam, (3) Max-Planck-Institut for Radioastronomie, 4), (4) King Abdulaziz University, (5) Chalmers University of Technology, A. Brunthaler (3), C. Henkel (3, Germany, H. L. Bethlem (2), India, J. Bagdonaite (2), K. M. Menten (3), M. Dapra (2) ((1) National Centre for Radio Astrophysics, N. Kanekar (1), Onsala Space Observatory, Saudi Arabia, S. Muller (5), Sweden), The Netherlands, W. Ubachs (2)

arxiv:1412.7757 v1 · 2014-12-24 · 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{EGNGKGNHFCFEFD62E2UYRPZ424}

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	2026-05-18T01:41:15.753708Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

219a6519a7288a428fda26a988bf3cd728b7aeddf09bbc0fd5a1d051b1c088a1

Aliases

arxiv: 1412.7757 · arxiv_version: 1412.7757v1 · doi: 10.48550/arxiv.1412.7757 · pith_short_12: EGNGKGNHFCFE · pith_short_16: EGNGKGNHFCFEFD62 · pith_short_8: EGNGKGNH

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/EGNGKGNHFCFEFD62E2UYRPZ424 \
  | 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: 219a6519a7288a428fda26a988bf3cd728b7aeddf09bbc0fd5a1d051b1c088a1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "11a9a4219ee069ce40103efa8ea5062c6a948c911dffb3ddee37a4adaffa01ef",
    "cross_cats_sorted": [
      "astro-ph.GA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2014-12-24T21:00:05Z",
    "title_canon_sha256": "9dd8f1d071b91a5b2c7570e243b20d036ad8c222793ec9e206884aa7602702ad"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1412.7757",
    "kind": "arxiv",
    "version": 1
  }
}