Pith Number

pith:SOUV7ZBK

pith:2018:SOUV7ZBKYZOYU7HNBK67PMBMMZ

not attested not anchored not stored refs pending

Vapor-cell frequency reference for short-wavelength transitions in neutral calcium

Bryan Hemingway, James Hanssen, Jennifer Taylor, Steven Peil, Thomas B. Swanson

arxiv:1806.04629 v1 · 2018-06-12 · physics.atom-ph · physics.ins-det · physics.optics

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SOUV7ZBKYZOYU7HNBK67PMBMMZ}

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	2026-05-18T00:11:33.331631Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93a95fe42ac65d8a7ced0abdf7b02c6674f6e44dcd987666e1e0b35d2787afd9

Aliases

arxiv: 1806.04629 · arxiv_version: 1806.04629v1 · doi: 10.48550/arxiv.1806.04629 · pith_short_12: SOUV7ZBKYZOY · pith_short_16: SOUV7ZBKYZOYU7HN · pith_short_8: SOUV7ZBK

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/SOUV7ZBKYZOYU7HNBK67PMBMMZ \
  | 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: 93a95fe42ac65d8a7ced0abdf7b02c6674f6e44dcd987666e1e0b35d2787afd9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "afb32cef4b345d8325753653672147588b2ed373ccb8a7f9a0f0b180ebbd854d",
    "cross_cats_sorted": [
      "physics.ins-det",
      "physics.optics"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2018-06-12T16:21:24Z",
    "title_canon_sha256": "37fb8b1d9fc2b5e8e130e8206a2faa955bf2a0490fea249efd58be58817d39ef"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1806.04629",
    "kind": "arxiv",
    "version": 1
  }
}