Pith Number

pith:OGWIIGWG

pith:2015:OGWIIGWGHUJFHP66J7KBC27AK4

not attested not anchored not stored refs pending

An Overview on the Estimation of Large Covariance and Precision Matrices

Han Liu, Jianqing Fan, Yuan Liao

arxiv:1504.02995 v2 · 2015-04-12 · 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{OGWIIGWGHUJFHP66J7KBC27AK4}

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.

Cited by

1 paper in Pith

High-Dimensional Data Analysis for Elliptically Symmetric Distributions

Receipt and verification

First computed	2026-05-18T02:18:40.203217Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

71ac841ac63d1253bfde4fd4116be0570a392437c5d08fa2d02dec4c3bd3c454

Aliases

arxiv: 1504.02995 · arxiv_version: 1504.02995v2 · doi: 10.48550/arxiv.1504.02995 · pith_short_12: OGWIIGWGHUJF · pith_short_16: OGWIIGWGHUJFHP66 · pith_short_8: OGWIIGWG

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/OGWIIGWGHUJFHP66J7KBC27AK4 \
  | 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: 71ac841ac63d1253bfde4fd4116be0570a392437c5d08fa2d02dec4c3bd3c454

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f701a249fb791c1fa367924574e6c30eb7eed82f003725eb5e83fcd489a94c76",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2015-04-12T18:08:17Z",
    "title_canon_sha256": "d195d3a82e53f66b474079578cbb0ec65ea76baf5ff956bcab967c6edcb16152"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1504.02995",
    "kind": "arxiv",
    "version": 2
  }
}