Pith Number

pith:SPQY4QVH

pith:2013:SPQY4QVHIRSK3XWCBNNDIH2NFK

not attested not anchored not stored refs pending

Group variable selection via convex Log-Exp-Sum penalty with application to a breast cancer survivor study

Grace Wahba, Menggang Yu, Patrick O. Monahan, Sijian Wang, Victoria Champion, Zhigeng Geng

arxiv:1306.4397 v1 · 2013-06-19 · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SPQY4QVHIRSK3XWCBNNDIH2NFK}

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	2026-05-18T03:20:34.596532Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

93e18e42a74464addec20b5a341f4d2abceed70b4214a53448d81adb5598c311

Aliases

arxiv: 1306.4397 · arxiv_version: 1306.4397v1 · doi: 10.48550/arxiv.1306.4397 · pith_short_12: SPQY4QVHIRSK · pith_short_16: SPQY4QVHIRSK3XWC · pith_short_8: SPQY4QVH

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/SPQY4QVHIRSK3XWCBNNDIH2NFK \
  | 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: 93e18e42a74464addec20b5a341f4d2abceed70b4214a53448d81adb5598c311

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "159a563cf7968ed24077f358a413d76ddbfed696773340b881474a71768b3abc",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2013-06-19T00:25:02Z",
    "title_canon_sha256": "0992817c18c0a26ddfc518acfce67f2086e4ec2d9da07ca20ebe9df8fdfc409f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1306.4397",
    "kind": "arxiv",
    "version": 1
  }
}