Pith Number

pith:PO4JOGGP

pith:2020:PO4JOGGP4OERALIKHHES464WPZ

not attested not anchored not stored refs pending

Selecting the number of components in PCA via random signflips

David Hong, Edgar Dobriban, Yue Sheng

arxiv:2012.02985 v5 · 2020-12-05 · math.ST · stat.ME · 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{PO4JOGGP4OERALIKHHES464WPZ}

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	2026-05-28T02:04:38.282395Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7bb89718cfe389102d0a39c92e7b967e7ec41f5b5d071c55fb56b2415b404335

Aliases

arxiv: 2012.02985 · arxiv_version: 2012.02985v5 · doi: 10.48550/arxiv.2012.02985 · pith_short_12: PO4JOGGP4OER · pith_short_16: PO4JOGGP4OERALIK · pith_short_8: PO4JOGGP

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/PO4JOGGP4OERALIKHHES464WPZ \
  | 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: 7bb89718cfe389102d0a39c92e7b967e7ec41f5b5d071c55fb56b2415b404335

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a301b694f74fa533aede1a374d7c93b62e9c2eef320a3ba771f538a92fea34a",
    "cross_cats_sorted": [
      "stat.ME",
      "stat.TH"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.ST",
    "submitted_at": "2020-12-05T09:29:21Z",
    "title_canon_sha256": "bac451c158501c34eca295c7a8b749eead3efb752ea09920592ff5f134ad7769"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2012.02985",
    "kind": "arxiv",
    "version": 5
  }
}