Pith Number

pith:4CCKDWUV

pith:2019:4CCKDWUVZ2VWNKOISC2E7O3BKC

not attested not anchored not stored refs pending

On the variability of regression shrinkage methods for clinical prediction models: simulation study on predictive performance

Ben Van Calster, Ewout W. Steyerberg, Maarten van Smeden

arxiv:1907.11493 v1 · 2019-07-26 · stat.ME

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4CCKDWUVZ2VWNKOISC2E7O3BKC}

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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	2026-05-17T23:39:28.953381Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e084a1da95ceab66a9c890b44fbb61509673f52388385dd5d446c0a7fd62c2b4

Aliases

arxiv: 1907.11493 · arxiv_version: 1907.11493v1 · doi: 10.48550/arxiv.1907.11493 · pith_short_12: 4CCKDWUVZ2VW · pith_short_16: 4CCKDWUVZ2VWNKOI · pith_short_8: 4CCKDWUV

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/4CCKDWUVZ2VWNKOISC2E7O3BKC \
  | 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: e084a1da95ceab66a9c890b44fbb61509673f52388385dd5d446c0a7fd62c2b4

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c8ce758214ec9c673b6de9cbbc4eb5c32fc4a8e1dc3385e1bbce8abaef1ce6f5",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2019-07-26T11:29:19Z",
    "title_canon_sha256": "109266643b374cd1e635653882b9e97a3cb5be1925bb8a927b4895ca97b2fe52"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1907.11493",
    "kind": "arxiv",
    "version": 1
  }
}