Pith Number

pith:GWWY62WE

pith:2012:GWWY62WE7BACIA67IZT6Y5TIQY

not attested not anchored not stored refs pending

Estimation of the Covariance Matrix of Large Dimensional Data

Abla Kammoun (LTCI), Jamal Najim (LTCI), Jianfeng Yao (LTCI)

arxiv:1201.4672 v1 · 2012-01-23 · cs.IT · math.IT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GWWY62WE7BACIA67IZT6Y5TIQY}

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	2026-05-18T01:58:43.624971Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

35ad8f6ac4f8402403df4667ec7668863cab55781bf08be6d498359f655524bc

Aliases

arxiv: 1201.4672 · arxiv_version: 1201.4672v1 · doi: 10.48550/arxiv.1201.4672 · pith_short_12: GWWY62WE7BAC · pith_short_16: GWWY62WE7BACIA67 · pith_short_8: GWWY62WE

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/GWWY62WE7BACIA67IZT6Y5TIQY \
  | 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: 35ad8f6ac4f8402403df4667ec7668863cab55781bf08be6d498359f655524bc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9720c585112a5530136d21524ad70eaba9577f89ed729b81d7cb05adab57dad9",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2012-01-23T10:43:19Z",
    "title_canon_sha256": "0d1bc0748d7c86941b731544230db10716a3fc51d0cd8640b1aa2798d9215e55"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.4672",
    "kind": "arxiv",
    "version": 1
  }
}