Pith Number

pith:UD5VPHOL

pith:2012:UD5VPHOL5QXBWCAA3UN7Q7LGXR

not attested not anchored not stored refs pending

Covariance Estimation: The GLM and Regularization Perspectives

Mohsen Pourahmadi

arxiv:1202.1661 v1 · 2012-02-08 · 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{UD5VPHOL5QXBWCAA3UN7Q7LGXR}

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	2026-05-18T04:02:51.629637Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a0fb579dcbec2e1b0800dd1bf87d66bc68c7b7d923820b32a8c68f7e33073d71

Aliases

arxiv: 1202.1661 · arxiv_version: 1202.1661v1 · doi: 10.48550/arxiv.1202.1661 · pith_short_12: UD5VPHOL5QXB · pith_short_16: UD5VPHOL5QXBWCAA · pith_short_8: UD5VPHOL

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/UD5VPHOL5QXBWCAA3UN7Q7LGXR \
  | 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: a0fb579dcbec2e1b0800dd1bf87d66bc68c7b7d923820b32a8c68f7e33073d71

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4aed1149ff2039b3356619fab4a0854c35efa4c8fc5625460f83f1690293369a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2012-02-08T11:25:29Z",
    "title_canon_sha256": "b4e9bc31a55ad1245ffebe7399ea9fd3829ef6cc13338aebc9f91bdc7cceac7c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.1661",
    "kind": "arxiv",
    "version": 1
  }
}