Pith Number

pith:T5KZKHH3

pith:2018:T5KZKHH33YKTL3CVDDR5TIUVUJ

not attested not anchored not stored refs pending

Heteroskedastic PCA: Algorithm, Optimality, and Applications

Anru R. Zhang, T. Tony Cai, Yihong Wu

arxiv:1810.08316 v3 · 2018-10-19 · math.ST · stat.CO · stat.ME · stat.ML · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{T5KZKHH33YKTL3CVDDR5TIUVUJ}

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.

Cited by

2 papers in Pith

Robust Heteroskedastic Matrix Factorization: A Generalization of PCA that Flags Outliers and Handles Missing Data

High-dimensional principal component analysis with heterogeneous missingness

Receipt and verification

First computed	2026-07-05T02:28:14.928284Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9f55951cfbde1535ec5518e3d9a295a27e542212aaad88d9e71d6b5051934c84

Aliases

arxiv: 1810.08316 · arxiv_version: 1810.08316v3 · doi: 10.48550/arxiv.1810.08316 · pith_short_12: T5KZKHH33YKT · pith_short_16: T5KZKHH33YKTL3CV · pith_short_8: T5KZKHH3

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/T5KZKHH33YKTL3CVDDR5TIUVUJ \
  | 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: 9f55951cfbde1535ec5518e3d9a295a27e542212aaad88d9e71d6b5051934c84

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "10564ad3ba0d0b27841e65966283811515ca8a03354b29af5d9df27ddb536e58",
    "cross_cats_sorted": [
      "stat.CO",
      "stat.ME",
      "stat.ML",
      "stat.TH"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2018-10-19T00:22:25Z",
    "title_canon_sha256": "dd21d0259a45a82e5d5e5d276ee35133bafb95dd412f58822e2ca622699ad1b4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1810.08316",
    "kind": "arxiv",
    "version": 3
  }
}