Pith Number

pith:2MWQV3B5

pith:2015:2MWQV3B5AQQ5ZETFBB2ORJCNT7

not attested not anchored not stored refs pending

Towards a sparse, scalable, and stably positive definite (inverse) covariance estimator

Bala Rajaratnam, Joong-Ho Won, Sang-Yun Oh

arxiv:1502.00471 v3 · 2015-02-02 · stat.ME

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2MWQV3B5AQQ5ZETFBB2ORJCNT7}

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	2026-05-18T01:11:55.232249Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d32d0aec3d0421dc92650874e8a44d9fcf579b2dc142b9e579558521353291e9

Aliases

arxiv: 1502.00471 · arxiv_version: 1502.00471v3 · doi: 10.48550/arxiv.1502.00471 · pith_short_12: 2MWQV3B5AQQ5 · pith_short_16: 2MWQV3B5AQQ5ZETF · pith_short_8: 2MWQV3B5

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/2MWQV3B5AQQ5ZETFBB2ORJCNT7 \
  | 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: d32d0aec3d0421dc92650874e8a44d9fcf579b2dc142b9e579558521353291e9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "70d81a501076f19cfac744b15f0dfc5f943725938b4d163af041542b78277cc4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-02-02T13:34:24Z",
    "title_canon_sha256": "16ee9efbe722fa487a0a83b3886f4c188dd3314c69c5d5325455581ad469a6a7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1502.00471",
    "kind": "arxiv",
    "version": 3
  }
}