Pith Number

pith:HMNTVALZ

pith:2019:HMNTVALZAUIOEIXBSCWPEI3LWT

not attested not anchored not stored refs pending

High-Resolution Hydrogen Spectroscopy and the Proton Radius Puzzle

Fran\c{c}ois Biraben, Fran\c{c}ois Nez, H\'el\`ene Fleurbaey, Lucile Julien, Sandrine Galtier, Simon Thomas

arxiv:1903.04252 v1 · 2019-03-11 · 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{HMNTVALZAUIOEIXBSCWPEI3LWT}

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	2026-05-17T23:51:36.048162Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3b1b3a81790510e222e190acf2236bb4c9a3e270d7193e9b9accebca0a5fb883

Aliases

arxiv: 1903.04252 · arxiv_version: 1903.04252v1 · doi: 10.48550/arxiv.1903.04252 · pith_short_12: HMNTVALZAUIO · pith_short_16: HMNTVALZAUIOEIXB · pith_short_8: HMNTVALZ

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/HMNTVALZAUIOEIXBSCWPEI3LWT \
  | 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: 3b1b3a81790510e222e190acf2236bb4c9a3e270d7193e9b9accebca0a5fb883

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9e467e1a0f2ce038f7902ce860f97b1a6d04cebd26c2b13f5d08f551c522e00f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2019-03-11T12:41:47Z",
    "title_canon_sha256": "a832ebdcdae305b93d55420446fcd0c34767a22662169826e98d352093325bd5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1903.04252",
    "kind": "arxiv",
    "version": 1
  }
}