Pith Number

pith:2UW4LMSJ

pith:2003:2UW4LMSJJOHGFQAFFM7EQMSGMC

not attested not anchored not stored refs pending

Precision Spectroscopy of Atomic Hydrogen and Variations of Fundamental Constants

A. Clairon, C. Salomon, F. Pereira Dos Santos, G. Santarelli, H. Marion, I. Maksimovic, J. Gr\"unert, M. Abgrall, M. Fischer, M. Zimmermann, N.Kolachevsky, P. Laurent, P. Lemonde, R. Holzwarth, S. Bize, Th. Udem, T.W. H\"ansch

arxiv:physics/0311128 v2 · 2003-11-26 · 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{2UW4LMSJJOHGFQAFFM7EQMSGMC}

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	2026-05-18T00:36:52.527767Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d52dc5b2494b8e62c0052b3e48324660a126b8f2139f3317c81da3484f7492cc

Aliases

arxiv: physics/0311128 · arxiv_version: physics/0311128v2 · doi: 10.48550/arxiv.physics/0311128 · pith_short_12: 2UW4LMSJJOHG · pith_short_16: 2UW4LMSJJOHGFQAF · pith_short_8: 2UW4LMSJ

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/2UW4LMSJJOHGFQAFFM7EQMSGMC \
  | 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: d52dc5b2494b8e62c0052b3e48324660a126b8f2139f3317c81da3484f7492cc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b1c0eca4b6ca2f2e8c35c2956a7d5386cb8a2449e842d1b62c06099872b9911e",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2003-11-26T13:33:31Z",
    "title_canon_sha256": "e543c68ec59486a5c0fb5c3329c79d475b72497f19acc7e9b54d7da164bd3206"
  },
  "schema_version": "1.0",
  "source": {
    "id": "physics/0311128",
    "kind": "arxiv",
    "version": 2
  }
}