Pith Number

pith:KWNKD6DK

pith:2015:KWNKD6DKKUMRN377PHMQLK2MC2

not attested not anchored not stored refs pending

Scalable Computation of Regularized Precision Matrices via Stochastic Optimization

Jie Chen, Rahul Mazumder, Yves F. Atchad\'e

arxiv:1509.00426 v1 · 2015-09-01 · math.ST · math.OC · 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{KWNKD6DKKUMRN377PHMQLK2MC2}

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	2026-05-18T01:34:14.120216Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

559aa1f86a551916efff79d905ab4c16ae8082738bf932267abb434b6039f6dd

Aliases

arxiv: 1509.00426 · arxiv_version: 1509.00426v1 · doi: 10.48550/arxiv.1509.00426 · pith_short_12: KWNKD6DKKUMR · pith_short_16: KWNKD6DKKUMRN377 · pith_short_8: KWNKD6DK

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/KWNKD6DKKUMRN377PHMQLK2MC2 \
  | 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: 559aa1f86a551916efff79d905ab4c16ae8082738bf932267abb434b6039f6dd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "15fd5b70af799e912248871b3d49f7e2979666dc5f583f29b356f3d6a0245733",
    "cross_cats_sorted": [
      "math.OC",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2015-09-01T18:25:32Z",
    "title_canon_sha256": "b796787679839714b69d1736315d9ccfbdb4ec823c88b4e984b03fd22494f718"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.00426",
    "kind": "arxiv",
    "version": 1
  }
}