Pith Number

pith:2HQ2RNYT

pith:2012:2HQ2RNYTPDCABXEFKAJS2OWKKN

not attested not anchored not stored refs pending

Joint Assessment of the Differential Item Functioning and Latent Trait Dimensionality of Students' National Tests

Francesco Bartolucci, Michela Gnaldi, Silvia Bacci

arxiv:1212.0378 v1 · 2012-12-03 · 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{2HQ2RNYTPDCABXEFKAJS2OWKKN}

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	2026-05-18T03:39:17.685150Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d1e1a8b71378c400dc8550132d3aca5367a53e87e237b226b72f79496d310974

Aliases

arxiv: 1212.0378 · arxiv_version: 1212.0378v1 · doi: 10.48550/arxiv.1212.0378 · pith_short_12: 2HQ2RNYTPDCA · pith_short_16: 2HQ2RNYTPDCABXEF · pith_short_8: 2HQ2RNYT

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/2HQ2RNYTPDCABXEFKAJS2OWKKN \
  | 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: d1e1a8b71378c400dc8550132d3aca5367a53e87e237b226b72f79496d310974

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "435e1c4de50efc1836dece2b89fd5c3b807fe9e78bdc1982c2a7d44026760f3a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2012-12-03T13:17:48Z",
    "title_canon_sha256": "22a33a64ce563bec582d8a3b33f7fca18f21ef6ed3f771056851933efe9da71c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.0378",
    "kind": "arxiv",
    "version": 1
  }
}