Pith Number

pith:4UHW7HLC

pith:2002:4UHW7HLCWHOCMXZHSH7AC4ANMG

not attested not anchored not stored refs pending

Precision study of positronium and precision tests of the bound state QED

Garching), Max-Planck-Institut fuer Quantenoptik, Savely G. Karshenboim (D. I. Mendeleev Institute for Metrology, St. Petersburg

arxiv:hep-ph/0201241 v1 · 2002-01-25 · hep-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{4UHW7HLCWHOCMXZHSH7AC4ANMG}

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	2026-07-04T16:33:59.642110Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e50f6f9d62b1dc265f2791fe01700d6183dfb4656ed027fb6502b28b5a08fd29

Aliases

arxiv: hep-ph/0201241 · arxiv_version: hep-ph/0201241v1 · doi: 10.48550/arxiv.hep-ph/0201241 · pith_short_12: 4UHW7HLCWHOC · pith_short_16: 4UHW7HLCWHOCMXZH · pith_short_8: 4UHW7HLC

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/4UHW7HLCWHOCMXZHSH7AC4ANMG \
  | 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: e50f6f9d62b1dc265f2791fe01700d6183dfb4656ed027fb6502b28b5a08fd29

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "892d1daa19647452e958aa5e98852da07ff4af9b2e1f81c79bebf4e72ddd81b2",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "hep-ph",
    "submitted_at": "2002-01-25T11:41:06Z",
    "title_canon_sha256": "e3e23f942d19678f3072678fc82e637be7645df6dfbd3853145a9afe1066cea1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "hep-ph/0201241",
    "kind": "arxiv",
    "version": 1
  }
}