Pith Number

pith:UHYVG4AS

pith:2017:UHYVG4ASDPTMDRLEDRO5BYOEKK

not attested not anchored not stored refs pending

Model-based Clustering with Sparse Covariance Matrices

Luca Scrucca, Michael Fop, Thomas Brendan Murphy

arxiv:1711.07748 v2 · 2017-11-21 · stat.ME · stat.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{UHYVG4ASDPTMDRLEDRO5BYOEKK}

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	2026-05-18T00:05:05.436401Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a1f15370121be6c1c5641c5dd0e1c452a4827d070a0e4add0f18de0ddfe18528

Aliases

arxiv: 1711.07748 · arxiv_version: 1711.07748v2 · doi: 10.48550/arxiv.1711.07748 · pith_short_12: UHYVG4ASDPTM · pith_short_16: UHYVG4ASDPTMDRLE · pith_short_8: UHYVG4AS

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/UHYVG4ASDPTMDRLEDRO5BYOEKK \
  | 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: a1f15370121be6c1c5641c5dd0e1c452a4827d070a0e4add0f18de0ddfe18528

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a2bb17c3cef2f764655af6ab74fd351ed7d2cc2180c9e2f87415ed7fec369b15",
    "cross_cats_sorted": [
      "stat.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2017-11-21T12:36:08Z",
    "title_canon_sha256": "1be09be982c0568cd901ba25340744721563d5cf6fc9397dc44fb91ef4057ddc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1711.07748",
    "kind": "arxiv",
    "version": 2
  }
}