Pith Number

pith:NLERCHSJ

pith:2018:NLERCHSJBFEITYK625AXDDIY5M

not attested not anchored not stored refs pending

De-biased sparse PCA: Inference and testing for eigenstructure of large covariance matrices

Jana Jankov\'a, Sara van de Geer

arxiv:1801.10567 v1 · 2018-01-31 · stat.ME · math.ST · stat.TH

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Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NLERCHSJBFEITYK625AXDDIY5M}

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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	2026-05-18T00:24:40.485560Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6ac9111e49094889e15ed741718d18eb206c1a39e999cc873420c197b323ece9

Aliases

arxiv: 1801.10567 · arxiv_version: 1801.10567v1 · doi: 10.48550/arxiv.1801.10567 · pith_short_12: NLERCHSJBFEI · pith_short_16: NLERCHSJBFEITYK6 · pith_short_8: NLERCHSJ

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/NLERCHSJBFEITYK625AXDDIY5M \
  | 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: 6ac9111e49094889e15ed741718d18eb206c1a39e999cc873420c197b323ece9

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "127c29e7ab6a44f32f43bebf58dd1bbe2946ae85f436b866f5983a2a01f25852",
    "cross_cats_sorted": [
      "math.ST",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ME",
    "submitted_at": "2018-01-31T17:30:55Z",
    "title_canon_sha256": "49690856f636ac24935cd4f25f2f736c34a5bb7e105f134ce4ba51e2c8a1a6f3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1801.10567",
    "kind": "arxiv",
    "version": 1
  }
}