Pith Number

pith:357DZX4X

pith:2018:357DZX4XGOJTYOEQQUHCTZMZK2

not attested not anchored not stored refs pending

Covariance Matrix Estimation from Linearly-Correlated Gaussian Samples

Wei Cui, Xu Zhang, Yulong Liu

arxiv:1808.01123 v2 · 2018-08-03 · 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{357DZX4XGOJTYOEQQUHCTZMZK2}

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	2026-05-17T23:51:05.566021Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

df7e3cdf9733933c3890850e29e59956877b0695ed44489dc43365344fbc7a2e

Aliases

arxiv: 1808.01123 · arxiv_version: 1808.01123v2 · doi: 10.48550/arxiv.1808.01123 · pith_short_12: 357DZX4XGOJT · pith_short_16: 357DZX4XGOJTYOEQ · pith_short_8: 357DZX4X

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/357DZX4XGOJTYOEQQUHCTZMZK2 \
  | 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: df7e3cdf9733933c3890850e29e59956877b0695ed44489dc43365344fbc7a2e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "266fa0ca4670e65a69c2d8e392a3990188e8d73724e3223a8a38b65478e88780",
    "cross_cats_sorted": [
      "math.IT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.IT",
    "submitted_at": "2018-08-03T09:02:17Z",
    "title_canon_sha256": "fadc3e3de9ea135f1499a18cc5d78569edbd5edb381b6cb1f0e39c52f9752656"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1808.01123",
    "kind": "arxiv",
    "version": 2
  }
}