Pith Number

pith:D4RPWBS7

pith:2010:D4RPWBS73LWDBYSNHCBCHTSTKV

not attested not anchored not stored refs pending

Robust Shrinkage Estimation of High-dimensional Covariance Matrices

Alfred O. Hero III, Ami Wiesel, Yilun Chen

arxiv:1009.5331 v1 · 2010-09-27 · 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{D4RPWBS73LWDBYSNHCBCHTSTKV}

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	2026-05-18T02:05:16.706128Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1f22fb065fdaec30e24d388223ce5355560418aa7da974350c99e0ffd28069b6

Aliases

arxiv: 1009.5331 · arxiv_version: 1009.5331v1 · doi: 10.48550/arxiv.1009.5331 · pith_short_12: D4RPWBS73LWD · pith_short_16: D4RPWBS73LWDBYSN · pith_short_8: D4RPWBS7

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/D4RPWBS73LWDBYSNHCBCHTSTKV \
  | 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: 1f22fb065fdaec30e24d388223ce5355560418aa7da974350c99e0ffd28069b6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6632a3bad269085c8fc16f2360a3ec83e3a94d7f11ab639e8d30b1cc4d6fd1a7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2010-09-27T17:13:05Z",
    "title_canon_sha256": "d5aff2b1f11f0f8a38bafb55fff278094768625ec3d9cab55ee0ad13be29226e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1009.5331",
    "kind": "arxiv",
    "version": 1
  }
}