Pith Number

pith:LJC7KFEC

pith:2010:LJC7KFEC4WKAASONO3RJWQGZD4

not attested not anchored not stored refs pending

Fine structure of helium and light helium-like ions

Krzysztof Pachucki, Vladimir A. Yerokhin

arxiv:1011.1370 v2 · 2010-11-05 · 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{LJC7KFEC4WKAASONO3RJWQGZD4}

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	2026-05-18T02:04:52.545119Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5a45f51482e5940049cd76e29b40d91f3582a5b724bb89f26197bb3d3cc1d3cd

Aliases

arxiv: 1011.1370 · arxiv_version: 1011.1370v2 · doi: 10.48550/arxiv.1011.1370 · pith_short_12: LJC7KFEC4WKA · pith_short_16: LJC7KFEC4WKAASON · pith_short_8: LJC7KFEC

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/LJC7KFEC4WKAASONO3RJWQGZD4 \
  | 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: 5a45f51482e5940049cd76e29b40d91f3582a5b724bb89f26197bb3d3cc1d3cd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "5e742d97e2344c93c5fcbd561e6fb52229c7b74a395e2efb26e4bfe5bf903a51",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2010-11-05T11:12:55Z",
    "title_canon_sha256": "a03ebe1c85c97a2fd70fcabb8a31a55a8597de48ab42d24eaf27eb78635edbec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1011.1370",
    "kind": "arxiv",
    "version": 2
  }
}