Pith Number

pith:UMS775HO

pith:2023:UMS775HOYOINVWS7TRCVWQK3OI

not attested not anchored not stored refs pending

Sparse Positive-Definite Estimation for Covariance Matrices with Repeated Measurements

Guo Yu, Juntao Duan, Sunpeng Duan, Yuedong Wang

arxiv:2304.08020 v3 · 2023-04-17 · stat.ME

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\usepackage{pith}
\pithnumber{UMS775HOYOINVWS7TRCVWQK3OI}

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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.

Cited by

1 paper in Pith

Moment-Based Selection of Multiresponse Linear Mixed-Effects Models

Receipt and verification

First computed	2026-07-05T06:19:19.331121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a325fff4eec390dada5f9c455b415b722283f9a305dc2249ed0ef27e923e45c6

Aliases

arxiv: 2304.08020 · arxiv_version: 2304.08020v3 · doi: 10.48550/arxiv.2304.08020 · pith_short_12: UMS775HOYOIN · pith_short_16: UMS775HOYOINVWS7 · pith_short_8: UMS775HO

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/UMS775HOYOINVWS7TRCVWQK3OI \
  | 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: a325fff4eec390dada5f9c455b415b722283f9a305dc2249ed0ef27e923e45c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a94e4ffdf1f0d607d10dbab8fe7a47c168201ff0ec77c0e42021b3f27c1e6e16",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2023-04-17T06:56:37Z",
    "title_canon_sha256": "411b7748b20e14e5bb606987d44a55fbf9eef17c611e77e9ce35c89ec1d7ac58"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2304.08020",
    "kind": "arxiv",
    "version": 3
  }
}