Pith Number

pith:JR4POGSP

pith:2026:JR4POGSPJCZAMANFCOZKIBSMOG

not attested not anchored not stored refs pending

Learning Item Embeddings and Hyperparameters for IRT Calibration via Monte Carlo EM

James Sharpnack, Kai-Ling Lo

arxiv:2607.06905 v1 · 2026-07-08 · 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{JR4POGSPJCZAMANFCOZKIBSMOG}

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	2026-07-09T00:19:39.066697Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

4c78f71a4f48b20601a513b2a4064c718efeab4ea3ea7c28d0cddf93c349238c

Aliases

arxiv: 2607.06905 · arxiv_version: 2607.06905v1 · doi: 10.48550/arxiv.2607.06905 · pith_short_12: JR4POGSPJCZA · pith_short_16: JR4POGSPJCZAMANF · pith_short_8: JR4POGSP

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/JR4POGSPJCZAMANFCOZKIBSMOG \
  | 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: 4c78f71a4f48b20601a513b2a4064c718efeab4ea3ea7c28d0cddf93c349238c

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f380111e60e390906e561bf7fa4832d12cf7fe5092d8398f6e99e4fce794b03a",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2026-07-08T01:57:42Z",
    "title_canon_sha256": "4a33ccafa804e56e54c17b6d608506422112a9e013914c9bcd5019108d955612"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.06905",
    "kind": "arxiv",
    "version": 1
  }
}