Pith Number

pith:5SV4LEET

pith:2025:5SV4LEETT2FRS4UBKZQWY2NFWW

not attested not anchored not stored refs pending

Maximum likelihood estimation in the sparse Rasch model

Lianqiang Qu, Pai Peng, Qiuping Wang, Shufang Wang, Ting Yan

arxiv:2501.07770 v1 · 2025-01-14 · 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{5SV4LEETT2FRS4UBKZQWY2NFWW}

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	2026-07-05T10:00:49.816120Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ecabc590939e8b19728156616c69a5b5bb42436e786ee1fd3195ecbd6ab7df0f

Aliases

arxiv: 2501.07770 · arxiv_version: 2501.07770v1 · doi: 10.48550/arxiv.2501.07770 · pith_short_12: 5SV4LEETT2FR · pith_short_16: 5SV4LEETT2FRS4UB · pith_short_8: 5SV4LEET

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/5SV4LEETT2FRS4UBKZQWY2NFWW \
  | 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: ecabc590939e8b19728156616c69a5b5bb42436e786ee1fd3195ecbd6ab7df0f

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c78d59e6d5992133eeca1802dbad42d32d937a8771496c29aa2c36750ccfe4c2",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2025-01-14T01:03:12Z",
    "title_canon_sha256": "23724c39e28be6528ec8d6afd6ecab5b8a716977945a94d8d9a375bc7461bdd1"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.07770",
    "kind": "arxiv",
    "version": 1
  }
}