Pith Number

pith:F3NGUT3D

pith:2014:F3NGUT3DEICBK7M2AOZZOMV5OG

not attested not anchored not stored refs pending

Covariance and precision matrix estimation for high-dimensional time series

Mengyu Xu, Wei Biao Wu, Xiaohui Chen

arxiv:1401.0993 v1 · 2014-01-06 · math.ST · 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{F3NGUT3DEICBK7M2AOZZOMV5OG}

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	2026-05-18T03:03:11.259121Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

2eda6a4f632204157d9a03b39732bd7187bd728ead2260c52e1a5c41e18f3053

Aliases

arxiv: 1401.0993 · arxiv_version: 1401.0993v1 · doi: 10.48550/arxiv.1401.0993 · pith_short_12: F3NGUT3DEICB · pith_short_16: F3NGUT3DEICBK7M2 · pith_short_8: F3NGUT3D

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/F3NGUT3DEICBK7M2AOZZOMV5OG \
  | 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: 2eda6a4f632204157d9a03b39732bd7187bd728ead2260c52e1a5c41e18f3053

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "8322d6a43dbb6673e2c9e7864ba4aabb2afbe4812364dc9c58ee003158885eee",
    "cross_cats_sorted": [
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2014-01-06T06:37:22Z",
    "title_canon_sha256": "739da668ce24b5f9a8079b6c5e974e7be893e0cc61699b6be08084c56c7dcf8c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.0993",
    "kind": "arxiv",
    "version": 1
  }
}