Pith Number

pith:L6QRG7IP

pith:2010:L6QRG7IPOS6MESSZNMY5UOHWPD

not attested not anchored not stored refs pending

Optical frequency measurement of the 1S-3S two-photon transition in hydrogen

Fran\c{c}ois Biraben (LKB - Jussieu), Fran\c{c}ois Nez (LKB - Jussieu), Lucile Julien (LKB - Jussieu), Olivier Arnoult (LKB - Jussieu)

arxiv:1007.4794 v1 · 2010-07-27 · 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{L6QRG7IPOS6MESSZNMY5UOHWPD}

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	2026-05-18T02:06:09.604136Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5fa1137d0f74bcc24a596b31da38f678fc23a3437501e0134b1ea8b45aa4d928

Aliases

arxiv: 1007.4794 · arxiv_version: 1007.4794v1 · doi: 10.48550/arxiv.1007.4794 · pith_short_12: L6QRG7IPOS6M · pith_short_16: L6QRG7IPOS6MESSZ · pith_short_8: L6QRG7IP

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/L6QRG7IPOS6MESSZNMY5UOHWPD \
  | 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: 5fa1137d0f74bcc24a596b31da38f678fc23a3437501e0134b1ea8b45aa4d928

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ba4b37eb4df89f9efc84d496b4a5d4548199f2150c7b3679f3d1693f0b413f47",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2010-07-27T18:52:02Z",
    "title_canon_sha256": "dd6dc834ae13f027164c1a129fd1c7638c1fd4dba9ae78b32e9ce8001af5d073"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1007.4794",
    "kind": "arxiv",
    "version": 1
  }
}