Pith Number

pith:CZABE5XW

pith:2013:CZABE5XW5E2LYGAPPQWQZZBNZ2

not attested not anchored not stored refs pending

An efficient Fisher-scoring algorithm for fitting latent class models with individual covariates

Antonio Forcina

arxiv:1301.7271 v2 · 2013-01-30 · stat.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{CZABE5XW5E2LYGAPPQWQZZBNZ2}

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	2026-05-18T01:27:08.373080Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

16401276f6e934bc180f7c2d0ce42dcebacf10fb5a418c6d9fce5c6d2351d956

Aliases

arxiv: 1301.7271 · arxiv_version: 1301.7271v2 · doi: 10.48550/arxiv.1301.7271 · pith_short_12: CZABE5XW5E2L · pith_short_16: CZABE5XW5E2LYGAP · pith_short_8: CZABE5XW

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/CZABE5XW5E2LYGAPPQWQZZBNZ2 \
  | 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: 16401276f6e934bc180f7c2d0ce42dcebacf10fb5a418c6d9fce5c6d2351d956

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "89121ba9dfcf511d58fb03fba922629dcba2b9586016d505324af127c9d603b6",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2013-01-30T16:19:07Z",
    "title_canon_sha256": "c5d9561e73ea6305ac772338994f2f8be5652337bd8ab7a5272e7aa0cd458990"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.7271",
    "kind": "arxiv",
    "version": 2
  }
}