Pith Number

pith:4Z3YF5DK

pith:2012:4Z3YF5DKQLARZJOU5WEQLCF6Y2

not attested not anchored not stored refs pending

Principal Component Analysis with Noisy and/or Missing Data

Stephen Bailey

arxiv:1208.4122 v2 · 2012-08-20 · astro-ph.IM · physics.data-an

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4Z3YF5DKQLARZJOU5WEQLCF6Y2}

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

1 paper in Pith

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

Receipt and verification

First computed	2026-05-18T01:55:09.018181Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e67782f46a82c11ca5d4ed890588bec6bccdde323c4d465c27ad5470500d8b46

Aliases

arxiv: 1208.4122 · arxiv_version: 1208.4122v2 · doi: 10.48550/arxiv.1208.4122 · pith_short_12: 4Z3YF5DKQLAR · pith_short_16: 4Z3YF5DKQLARZJOU · pith_short_8: 4Z3YF5DK

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/4Z3YF5DKQLARZJOU5WEQLCF6Y2 \
  | 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: e67782f46a82c11ca5d4ed890588bec6bccdde323c4d465c27ad5470500d8b46

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bf92e983093d8d1f5ae1b93da9a54da0461b8a43e4467e40086f81c4c3f2cd7f",
    "cross_cats_sorted": [
      "physics.data-an"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "astro-ph.IM",
    "submitted_at": "2012-08-20T20:59:10Z",
    "title_canon_sha256": "b19a8be2a439234bdd2b6655920786f2b8a5bc55e134a1fce66b3f96f611c97f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1208.4122",
    "kind": "arxiv",
    "version": 2
  }
}