Pith Number

pith:V2RJOR65

pith:2025:V2RJOR65UVA7SE44QCGEMJX7NU

not attested not anchored not stored refs pending

High-Performance Variance-Covariance Matrix Construction Using an Uncentered Gram Formulation

Felix Reichel

arxiv:2511.08223 v2 · 2025-11-11 · stat.CO · cs.LG · cs.NA · math.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{V2RJOR65UVA7SE44QCGEMJX7NU}

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	2026-06-02T03:04:35.542429Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

aea29747dda541f9139c808c4626ff6d152e5d9243f0ca17a8535b54bd96ee57

Aliases

arxiv: 2511.08223 · arxiv_version: 2511.08223v2 · doi: 10.48550/arxiv.2511.08223 · pith_short_12: V2RJOR65UVA7 · pith_short_16: V2RJOR65UVA7SE44 · pith_short_8: V2RJOR65

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/V2RJOR65UVA7SE44QCGEMJX7NU \
  | 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: aea29747dda541f9139c808c4626ff6d152e5d9243f0ca17a8535b54bd96ee57

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4f294dce9719231868fe4b415094f9fe2bf9e5d2436f7c01f5c3eb022eee1804",
    "cross_cats_sorted": [
      "cs.LG",
      "cs.NA",
      "math.NA"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "stat.CO",
    "submitted_at": "2025-11-11T13:27:05Z",
    "title_canon_sha256": "de1aa185f885d4c336d2984b7328d21a54f5fda3d056e45b52d08259b107fa0c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2511.08223",
    "kind": "arxiv",
    "version": 2
  }
}