Pith Number

pith:SQOCFE3Y

pith:2026:SQOCFE3YZ575CA2GUKKDGDRLIX

not attested not anchored not stored refs pending

Identifiability of Partial-Mastery Cognitive Diagnostic Models

Elena Erosheva, Jun Wu, Patr\'icia Martinkov\'a

arxiv:2607.16593 v1 · 2026-07-18 · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{SQOCFE3YZ575CA2GUKKDGDRLIX}

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	2026-07-21T00:20:27.306515Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

941c229378cf7fd10346a294330e2b45d004cf13fa76cd7533528f123851b5eb

Aliases

arxiv: 2607.16593 · arxiv_version: 2607.16593v1 · doi: 10.48550/arxiv.2607.16593 · pith_short_12: SQOCFE3YZ575 · pith_short_16: SQOCFE3YZ575CA2G · pith_short_8: SQOCFE3Y

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/SQOCFE3YZ575CA2GUKKDGDRLIX \
  | 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: 941c229378cf7fd10346a294330e2b45d004cf13fa76cd7533528f123851b5eb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8defc6c4dc4bf584e85161ac1a52885bd2f0e51dc1b76227cbf2d860821d5556",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2026-07-18T02:24:51Z",
    "title_canon_sha256": "9d1ca638bd713d442b78e0268b6f7264db824a66dc84bb13fa22f73c0a5cf8f1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.16593",
    "kind": "arxiv",
    "version": 1
  }
}