Pith Number

pith:FDCRMWNI

pith:2015:FDCRMWNI7GMIAQQOJ636VYYNLT

not attested not anchored not stored refs pending

Item focussed Trees for the Identification of Items in Differential Item Functioning

Gerhard Tutz, Moritz Berger

arxiv:1502.04329 v1 · 2015-02-15 · 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{FDCRMWNI7GMIAQQOJ636VYYNLT}

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	2026-05-18T02:26:59.948868Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

28c51659a8f99880420e4fb7eae30d5cd581096c6d84a45ca68dc20b163e645c

Aliases

arxiv: 1502.04329 · arxiv_version: 1502.04329v1 · doi: 10.48550/arxiv.1502.04329 · pith_short_12: FDCRMWNI7GMI · pith_short_16: FDCRMWNI7GMIAQQO · pith_short_8: FDCRMWNI

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/FDCRMWNI7GMIAQQOJ636VYYNLT \
  | 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: 28c51659a8f99880420e4fb7eae30d5cd581096c6d84a45ca68dc20b163e645c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c1a5426e534839ed9bb7494ac820de9e34df747b721eed2cc644d8ae46eae5c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-02-15T16:22:44Z",
    "title_canon_sha256": "d9f47084c67ac64891b29cc478da4f1747fa5c1d3cd836a79f744b101a0acbbc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.04329",
    "kind": "arxiv",
    "version": 1
  }
}