Pith Number

pith:CBHGD53U

pith:2011:CBHGD53UBFDTI4J4H6KZIL2LU4

not attested not anchored not stored refs pending

Radium single-ion optical clock

H. W. Wilschut, K. Jungmann, L. Willmann, L. W. Wansbeek, O. O. Versolato, R. G. E. Timmermans

arxiv:1102.4988 v1 · 2011-02-24 · 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{CBHGD53UBFDTI4J4H6KZIL2LU4}

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	2026-05-18T04:27:57.613866Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

104e61f774094734713c3f95942f4ba71505df64ea02cf8fc0371d2944b74df5

Aliases

arxiv: 1102.4988 · arxiv_version: 1102.4988v1 · doi: 10.48550/arxiv.1102.4988 · pith_short_12: CBHGD53UBFDT · pith_short_16: CBHGD53UBFDTI4J4 · pith_short_8: CBHGD53U

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/CBHGD53UBFDTI4J4H6KZIL2LU4 \
  | 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: 104e61f774094734713c3f95942f4ba71505df64ea02cf8fc0371d2944b74df5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "506374892372fb88cd80cfa1e978ba0b36fbc391539247c0c4764fb2dd528e09",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2011-02-24T13:42:10Z",
    "title_canon_sha256": "2bb4afaadc2e56c8a197568205513ec6a7e01caee00c2962d4752b919c501b64"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1102.4988",
    "kind": "arxiv",
    "version": 1
  }
}