Pith Number

pith:QCUKEABC

pith:2012:QCUKEABC6C7CVDBCIAITKISJDI

not attested not anchored not stored refs pending

Optimal classification in sparse Gaussian graphic model

Jiashun Jin, Yingying Fan, Zhigang Yao

arxiv:1212.5332 v2 · 2012-12-21 · stat.ML · 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{QCUKEABC6C7CVDBCIAITKISJDI}

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	2026-05-18T03:06:42.986500Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80a8a20022f0be2a8c2240113522491a152781b2b561c8f016d5f0545a38327e

Aliases

arxiv: 1212.5332 · arxiv_version: 1212.5332v2 · doi: 10.48550/arxiv.1212.5332 · pith_short_12: QCUKEABC6C7C · pith_short_16: QCUKEABC6C7CVDBC · pith_short_8: QCUKEABC

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/QCUKEABC6C7CVDBCIAITKISJDI \
  | 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: 80a8a20022f0be2a8c2240113522491a152781b2b561c8f016d5f0545a38327e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f1ea0b94627729d3ea21ebcc1be5a898c4d006ef060155ab10524a18c7a55d68",
    "cross_cats_sorted": [
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2012-12-21T04:25:12Z",
    "title_canon_sha256": "8bb09fbb0e33e65cef9356f90946da2a1f9135c642666bd9cf4265f92a04da81"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.5332",
    "kind": "arxiv",
    "version": 2
  }
}