Pith Number

pith:3KBN4OS2

pith:2005:3KBN4OS2CCGBI7T5JLOTGVUYRB

not attested not anchored not stored refs pending

Sparse Covariance Selection via Robust Maximum Likelihood Estimation

Alexandre d'Aspremont, Laurent El Ghaoui, Onureena Banerjee

arxiv:cs/0506023 v1 · 2005-06-08 · cs.CE · cs.AI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3KBN4OS2CCGBI7T5JLOTGVUYRB}

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	2026-07-04T14:25:02.968945Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

da82de3a5a108c147e7d4add33569888644271175db5829a9bc8320148565a41

Aliases

arxiv: cs/0506023 · arxiv_version: cs/0506023v1 · doi: 10.48550/arxiv.cs/0506023 · pith_short_12: 3KBN4OS2CCGB · pith_short_16: 3KBN4OS2CCGBI7T5 · pith_short_8: 3KBN4OS2

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/3KBN4OS2CCGBI7T5JLOTGVUYRB \
  | 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: da82de3a5a108c147e7d4add33569888644271175db5829a9bc8320148565a41

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e2cb77dd8f235e022f6e8f0bb4b30ec77ddf2d92be4776255f734d44c2a4167b",
    "cross_cats_sorted": [
      "cs.AI"
    ],
    "license": "",
    "primary_cat": "cs.CE",
    "submitted_at": "2005-06-08T21:08:38Z",
    "title_canon_sha256": "8d21df84a339033d52f12569d061279a2258a9f7b1b683649359a49faa6694cc"
  },
  "schema_version": "1.0",
  "source": {
    "id": "cs/0506023",
    "kind": "arxiv",
    "version": 1
  }
}