Pith Number

pith:ZD2IZY5Y

pith:2012:ZD2IZY5YMUUUTD3IXLD6IV5WCR

not attested not anchored not stored refs pending

Iterative Thresholding Algorithm for Sparse Inverse Covariance Estimation

Arian Maleki, Bala Rajaratnam, Benjamin T. Rolfs, Dominique Guillot, Ian Wong

arxiv:1211.2532 v3 · 2012-11-12 · stat.CO · cs.LG · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ZD2IZY5YMUUUTD3IXLD6IV5WCR}

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	2026-05-18T03:39:52.605092Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c8f48ce3b86529498f68bac7e457b6144b25c3b89e7d62a9f50c7b505b147e57

Aliases

arxiv: 1211.2532 · arxiv_version: 1211.2532v3 · doi: 10.48550/arxiv.1211.2532 · pith_short_12: ZD2IZY5YMUUU · pith_short_16: ZD2IZY5YMUUUTD3I · pith_short_8: ZD2IZY5Y

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/ZD2IZY5YMUUUTD3IXLD6IV5WCR \
  | 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: c8f48ce3b86529498f68bac7e457b6144b25c3b89e7d62a9f50c7b505b147e57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "feb11b02a1f1ef8b6954c79889c123acde1ea2ef29db53070472e29d6aa97ce9",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2012-11-12T08:35:26Z",
    "title_canon_sha256": "2702e30cc1e325fa537080191a1c1832e31eaf084cf5100e1da175889770bfb3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1211.2532",
    "kind": "arxiv",
    "version": 3
  }
}