Pith Number

pith:T4KG2CGN

pith:2014:T4KG2CGN76D2EQ5VEYTAZAJ6LJ

not attested not anchored not stored refs pending

A multilevel finite mixture item response model to cluster examinees and schools

Francesco Bartolucci, Michela Gnaldi, Silvia Bacci

arxiv:1408.2319 v1 · 2014-08-11 · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T4KG2CGN76D2EQ5VEYTAZAJ6LJ}

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	2026-05-18T02:45:29.706328Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f146d08cdff87a243b526260c813e5a5cba97c194afd3326452f1287b55ec33

Aliases

arxiv: 1408.2319 · arxiv_version: 1408.2319v1 · doi: 10.48550/arxiv.1408.2319 · pith_short_12: T4KG2CGN76D2 · pith_short_16: T4KG2CGN76D2EQ5V · pith_short_8: T4KG2CGN

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/T4KG2CGN76D2EQ5VEYTAZAJ6LJ \
  | 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: 9f146d08cdff87a243b526260c813e5a5cba97c194afd3326452f1287b55ec33

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9794055f46e8a6a31d786b21e2bd17343fff41de9a6829b0d0b746b0cd876d1f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2014-08-11T06:02:25Z",
    "title_canon_sha256": "89080f22481ab8162238c5f147c5207ba48e5e2d10864af0477881a0c2287557"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.2319",
    "kind": "arxiv",
    "version": 1
  }
}