Pith Number

pith:MPZXOVBD

pith:2019:MPZXOVBDMCOYSTMYKIS5PFNY4K

not attested not anchored not stored refs pending

Quantum electrodynamic corrections to the $1s3d$ states of the helium atom

Albert Wienczek, Krzysztof Pachucki, Mariusz Puchalski, Vladimir A. Yerokhin, Vojt\v{e}ch Patk\'o\v{s}

arxiv:1904.02015 v2 · 2019-04-03 · 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{MPZXOVBDMCOYSTMYKIS5PFNY4K}

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	2026-05-17T23:46:28.631461Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

63f3775423609d894d985225d795b8e289c2bd6e3bf705f083ba9e01d7c01aa6

Aliases

arxiv: 1904.02015 · arxiv_version: 1904.02015v2 · doi: 10.48550/arxiv.1904.02015 · pith_short_12: MPZXOVBDMCOY · pith_short_16: MPZXOVBDMCOYSTMY · pith_short_8: MPZXOVBD

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/MPZXOVBDMCOYSTMYKIS5PFNY4K \
  | 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: 63f3775423609d894d985225d795b8e289c2bd6e3bf705f083ba9e01d7c01aa6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d6b79d78005835b38d6fcf4aa5aca3ef7af113da67d914d235ba9a65e7bd04d7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2019-04-03T14:09:34Z",
    "title_canon_sha256": "2e919796fea45be3a7d591f2baf53408578c571ff97fe09923ff01d37b830ae8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1904.02015",
    "kind": "arxiv",
    "version": 2
  }
}