Pith Number

pith:BDD6ZH6D

pith:2016:BDD6ZH6DWAO5YIFZAWFYZYL5QS

not attested not anchored not stored refs pending

Orthogonal Sparse PCA and Covariance Estimation via Procrustes Reformulation

Daniel P. Palomar, Konstantinos Benidis, Prabhu Babu, Ying Sun

arxiv:1602.03992 v1 · 2016-02-12 · stat.ML · cs.LG · math.OC · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BDD6ZH6DWAO5YIFZAWFYZYL5QS}

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	2026-05-18T01:00:39.726946Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

08c7ec9fc3b01ddc20b9058b8ce17d8483e5c1dfedb3b57b9910e8b3311939d6

Aliases

arxiv: 1602.03992 · arxiv_version: 1602.03992v1 · doi: 10.48550/arxiv.1602.03992 · pith_short_12: BDD6ZH6DWAO5 · pith_short_16: BDD6ZH6DWAO5YIFZ · pith_short_8: BDD6ZH6D

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/BDD6ZH6DWAO5YIFZAWFYZYL5QS \
  | 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: 08c7ec9fc3b01ddc20b9058b8ce17d8483e5c1dfedb3b57b9910e8b3311939d6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d828addecadb93b57ccd329dc689fde96cce345f499a4727ca844e6708834116",
    "cross_cats_sorted": [
      "cs.LG",
      "math.OC",
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2016-02-12T09:48:22Z",
    "title_canon_sha256": "04b0ec2aa8a759961d2d28708ab3dc88382414dc52ac25a75f68d49e353954d7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1602.03992",
    "kind": "arxiv",
    "version": 1
  }
}