Pith Number

pith:27QUDMRQ

pith:2009:27QUDMRQMFWIBEPRSTANWSQ7MY

not attested not anchored not stored refs pending

Fundamental constants and tests of theory in Rydberg states of hydrogen-like ions

B. J. Wundt, J. N. Tan, P. J. Mohr, U. D. Jentschura

arxiv:0901.4950 v1 · 2009-01-30 · 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{27QUDMRQMFWIBEPRSTANWSQ7MY}

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	2026-07-04T15:37:08.978175Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d7e141b230616c8091f194c0db4a1f6602452fc790e27078449277e080597320

Aliases

arxiv: 0901.4950 · arxiv_version: 0901.4950v1 · doi: 10.48550/arxiv.0901.4950 · pith_short_12: 27QUDMRQMFWI · pith_short_16: 27QUDMRQMFWIBEPR · pith_short_8: 27QUDMRQ

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/27QUDMRQMFWIBEPRSTANWSQ7MY \
  | 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: d7e141b230616c8091f194c0db4a1f6602452fc790e27078449277e080597320

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e76c8ee333f1ecd9b1bcfcaa573daf31eb79642e640bbbad5b6e442a06ce9897",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.atom-ph",
    "submitted_at": "2009-01-30T20:50:24Z",
    "title_canon_sha256": "c11884d3b747eada8fa871f3ec6165fd173914be2cbd554a80b0531500f45fa0"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0901.4950",
    "kind": "arxiv",
    "version": 1
  }
}