Pith Number

pith:LF64CWGI

pith:2013:LF64CWGIXZKB6BKFLKNNV7WYY4

not attested not anchored not stored refs pending

Inverse Covariance Estimation for High-Dimensional Data in Linear Time and Space: Spectral Methods for Riccati and Sparse Models

Jean Honorio, Tommi S. Jaakkola

arxiv:1309.6838 v1 · 2013-09-26 · 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{LF64CWGIXZKB6BKFLKNNV7WYY4}

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	2026-05-18T00:00:41.686825Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

597dc158c8be541f05455a9adafed8c73943d6e466c89c8d23b0c5dca3445b8e

Aliases

arxiv: 1309.6838 · arxiv_version: 1309.6838v1 · doi: 10.48550/arxiv.1309.6838 · pith_short_12: LF64CWGIXZKB · pith_short_16: LF64CWGIXZKB6BKF · pith_short_8: LF64CWGI

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/LF64CWGIXZKB6BKFLKNNV7WYY4 \
  | 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: 597dc158c8be541f05455a9adafed8c73943d6e466c89c8d23b0c5dca3445b8e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "22ca049465a54337e228a858b98820249805d144bb0c5073a35d7a82a7b48442",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-09-26T12:41:38Z",
    "title_canon_sha256": "3d919c007eb86d8bd0389d4441fa359d57337f23acca00c2ac2800723682b146"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1309.6838",
    "kind": "arxiv",
    "version": 1
  }
}