Pith Number

pith:GASYVZDS

pith:2018:GASYVZDSFVA4FM7F527V4WO4B4

not attested not anchored not stored refs pending

Recovery of spectrum from estimated covariance matrices and statistical kernels for machine learning and big data

Heinrich Matzinger, Ionel Popescu, Juntao Duan, Saba Amsalu

arxiv:1804.09472 v1 · 2018-04-25 · math.PR · math.ST · stat.TH

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{GASYVZDSFVA4FM7F527V4WO4B4}

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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	2026-05-18T00:17:31.695514Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

30258ae4722d41c2b3e5eebf5e59dc0f1b57aaa6baeb7c59db5f3f6ef4fdb010

Aliases

arxiv: 1804.09472 · arxiv_version: 1804.09472v1 · doi: 10.48550/arxiv.1804.09472 · pith_short_12: GASYVZDSFVA4 · pith_short_16: GASYVZDSFVA4FM7F · pith_short_8: GASYVZDS

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/GASYVZDSFVA4FM7F527V4WO4B4 \
  | 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: 30258ae4722d41c2b3e5eebf5e59dc0f1b57aaa6baeb7c59db5f3f6ef4fdb010

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e30b0162749044a1f114aa3ab0baf40cc1ee8c2e94932f7aa798d747416caf80",
    "cross_cats_sorted": [
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.PR",
    "submitted_at": "2018-04-25T10:38:00Z",
    "title_canon_sha256": "48d06f039d0554cec152bd0a474a758c399a2e9295ec7abecf363b1a4a6378cb"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1804.09472",
    "kind": "arxiv",
    "version": 1
  }
}