Pith Number

pith:ZTNNL5AO

pith:2015:ZTNNL5AOS3MAZLREWJCFVH7ALI

not attested not anchored not stored refs pending

Detection of Uniform and Non-Uniform Differential Item Functioning by Item Focussed Trees

Gerhard Tutz, Moritz Berger

arxiv:1511.07178 v1 · 2015-11-23 · 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{ZTNNL5AOS3MAZLREWJCFVH7ALI}

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	2026-05-18T01:26:12.026579Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ccdad5f40e96d80cae24b2445a9fe05a190c5198f45af1f315bc716ee3514b87

Aliases

arxiv: 1511.07178 · arxiv_version: 1511.07178v1 · doi: 10.48550/arxiv.1511.07178 · pith_short_12: ZTNNL5AOS3MA · pith_short_16: ZTNNL5AOS3MAZLRE · pith_short_8: ZTNNL5AO

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/ZTNNL5AOS3MAZLREWJCFVH7ALI \
  | 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: ccdad5f40e96d80cae24b2445a9fe05a190c5198f45af1f315bc716ee3514b87

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7d95de98f4c17409511707c2e33067ac7065f07c3d400df26875b5bc79b7476",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-11-23T11:17:05Z",
    "title_canon_sha256": "170ba2f650b8b8a8fe49aea9c0d14e8d94285e9b6877d7c981ea47d3654b7799"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1511.07178",
    "kind": "arxiv",
    "version": 1
  }
}