Pith Number

pith:GEY2NGOP

pith:2022:GEY2NGOPUHPT5UK5K7ZZQUT5KQ

not attested not anchored not stored refs pending

Power laws prevail in medical ultrasound

Kevin J. Parker

arxiv:2203.04239 v1 · 2022-03-08 · physics.med-ph · physics.bio-ph · q-bio.TO

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GEY2NGOPUHPT5UK5K7ZZQUT5KQ}

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	2026-07-05T04:19:55.824305Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3131a699cfa1df3ed15d57f398527d543424e105f0cfd53277f926e6537bf37f

Aliases

arxiv: 2203.04239 · arxiv_version: 2203.04239v1 · doi: 10.48550/arxiv.2203.04239 · pith_short_12: GEY2NGOPUHPT · pith_short_16: GEY2NGOPUHPT5UK5 · pith_short_8: GEY2NGOP

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/GEY2NGOPUHPT5UK5K7ZZQUT5KQ \
  | 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: 3131a699cfa1df3ed15d57f398527d543424e105f0cfd53277f926e6537bf37f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "dd41b65a3cbfa039929cda177b4d38eeffd448331d8f66471ddec305602b9445",
    "cross_cats_sorted": [
      "physics.bio-ph",
      "q-bio.TO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.med-ph",
    "submitted_at": "2022-03-08T17:57:51Z",
    "title_canon_sha256": "1ee3823fe1a528dbec1f9b1bb93048de5015cc08aabc37804be05b212bbec4b3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2203.04239",
    "kind": "arxiv",
    "version": 1
  }
}