Pith Number

pith:PI3PUTKF

pith:2012:PI3PUTKFAV46MDG5OL3PDF562D

not attested not anchored not stored refs pending

Sparse estimation via nonconcave penalized likelihood in a factor analysis model

Kei Hirose, Michio Yamamoto

arxiv:1205.5868 v3 · 2012-05-26 · stat.ME · stat.CO · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{PI3PUTKFAV46MDG5OL3PDF562D}

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	2026-05-18T03:30:53.775989Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7a36fa4d450579e60cdd72f6f197bed0e8a9d625b4ea3c71ea18a8566143b611

Aliases

arxiv: 1205.5868 · arxiv_version: 1205.5868v3 · doi: 10.48550/arxiv.1205.5868 · pith_short_12: PI3PUTKFAV46 · pith_short_16: PI3PUTKFAV46MDG5 · pith_short_8: PI3PUTKF

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/PI3PUTKFAV46MDG5OL3PDF562D \
  | 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: 7a36fa4d450579e60cdd72f6f197bed0e8a9d625b4ea3c71ea18a8566143b611

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "531dc69517547e912e3277dedc5d6819ce2d688219365e56546115e934439900",
    "cross_cats_sorted": [
      "stat.CO",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2012-05-26T10:04:27Z",
    "title_canon_sha256": "56c726ee11362e4a2c79d843a748010a2159ee3249f158fd657103db4700f604"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1205.5868",
    "kind": "arxiv",
    "version": 3
  }
}