Pith Number

pith:UMHNUX52

pith:2019:UMHNUX52BG4BQU2PLWHXPOEGTD

not attested not anchored not stored refs pending

Reproducibility of an airway tapering measurement in CT with application to bronchiectasis

David J. Hawkes, Jeremy S. Brown, John R. Hurst, Joseph Jacob, Kin Quan, Rebecca J. Shipley, Ryutaro Tanno

arxiv:1909.07454 v1 · 2019-09-16 · cs.CV · physics.med-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{UMHNUX52BG4BQU2PLWHXPOEGTD}

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	2026-07-05T00:04:57.373329Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a30eda5fba09b818534f5d8f77b88698fb7823b1b1293fe53dac1e04ceba97de

Aliases

arxiv: 1909.07454 · arxiv_version: 1909.07454v1 · doi: 10.48550/arxiv.1909.07454 · pith_short_12: UMHNUX52BG4B · pith_short_16: UMHNUX52BG4BQU2P · pith_short_8: UMHNUX52

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/UMHNUX52BG4BQU2PLWHXPOEGTD \
  | 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: a30eda5fba09b818534f5d8f77b88698fb7823b1b1293fe53dac1e04ceba97de

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "90e70dddf42574910a8fa2226159c9e3bd668a90b9c845c7907e730427b354d9",
    "cross_cats_sorted": [
      "physics.med-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2019-09-16T19:49:01Z",
    "title_canon_sha256": "d36e9604eda9f6074f5d9e5426f408d72c034993d148cba59450f3ff5e86f343"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1909.07454",
    "kind": "arxiv",
    "version": 1
  }
}