Pith Number

pith:YLO2VHPR

pith:2012:YLO2VHPR4IKKBL2XAGYFFMHFKV

not attested not anchored not stored refs pending

First cosmological constraints on the proton-to-electron mass ratio from observations of rotational transitions of methanol

J.E.J. Lovell (1) ((1) School of Mathematics, M.A. Voronkov (2), Physics, S.L. Breen (2), Space Science), S.P. Ellingsen (1), University of Tasmania (2) CSIRO Astronomy

arxiv:1201.5644 v1 · 2012-01-26 · astro-ph.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YLO2VHPR4IKKBL2XAGYFFMHFKV}

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	2026-05-18T01:58:41.192339Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c2ddaa9df1e214a0af5701b052b0e555619aa8d4d0089da47eb25b47bfb2b2bf

Aliases

arxiv: 1201.5644 · arxiv_version: 1201.5644v1 · doi: 10.48550/arxiv.1201.5644 · pith_short_12: YLO2VHPR4IKK · pith_short_16: YLO2VHPR4IKKBL2X · pith_short_8: YLO2VHPR

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/YLO2VHPR4IKKBL2XAGYFFMHFKV \
  | 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: c2ddaa9df1e214a0af5701b052b0e555619aa8d4d0089da47eb25b47bfb2b2bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "70992390c67970cc98a2cac527bbb7864220a5708300283fb6694fd3c7ee45c6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.CO",
    "submitted_at": "2012-01-26T21:00:03Z",
    "title_canon_sha256": "bdb285dc10d885084debe86b827b5da4a91efd38e3514357c757099b9cea88ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.5644",
    "kind": "arxiv",
    "version": 1
  }
}