Pith Number

pith:WSJRXGME

pith:2013:WSJRXGMEKPWV5UZBRWJINQPFGN

not attested not anchored not stored refs pending

A search for varying fundamental constants using Hz-level frequency measurements of cold CH molecules

Christian Henkel, E. A. Hinds, H. J. Lewandowski, M. G. Kozlov, M. R. Tarbutt, R. J. Hendricks, S. K. Tokunaga, S. Truppe

arxiv:1308.1496 v1 · 2013-08-07 · 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{WSJRXGMEKPWV5UZBRWJINQPFGN}

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	2026-05-18T01:48:22.813021Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4931b998453ed5ed3218d9286c1e533400fdebb9cfa4d00d015aaba559dc7d7

Aliases

arxiv: 1308.1496 · arxiv_version: 1308.1496v1 · doi: 10.48550/arxiv.1308.1496 · pith_short_12: WSJRXGMEKPWV · pith_short_16: WSJRXGMEKPWV5UZB · pith_short_8: WSJRXGME

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/WSJRXGMEKPWV5UZBRWJINQPFGN \
  | 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: b4931b998453ed5ed3218d9286c1e533400fdebb9cfa4d00d015aaba559dc7d7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "fe0de890c0ddedf5c302d2f9fe6b39c2008f082ee2f852821356484390b17d00",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2013-08-07T08:03:52Z",
    "title_canon_sha256": "83fbdef5c8f1014547c4d6f7ffe0a76c776bc5c52d96de699eac431418e14a85"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1308.1496",
    "kind": "arxiv",
    "version": 1
  }
}