Pith Number

pith:4FQ3M6ZN

pith:2013:4FQ3M6ZN2OBM7WJ4WY2ZJH4B6B

not attested not anchored not stored refs pending

On Robust Face Recognition via Sparse Encoding: the Good, the Bad, and the Ugly

Conrad Sanderson, Mehrtash T. Harandi, Yongkang Wong

arxiv:1303.1624 v1 · 2013-03-07 · cs.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4FQ3M6ZN2OBM7WJ4WY2ZJH4B6B}

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	2026-05-18T02:31:02.520042Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e161b67b2dd382cfd93cb635949f81f066894f5bc91cf564dee6ad1f7852dfba

Aliases

arxiv: 1303.1624 · arxiv_version: 1303.1624v1 · doi: 10.48550/arxiv.1303.1624 · pith_short_12: 4FQ3M6ZN2OBM · pith_short_16: 4FQ3M6ZN2OBM7WJ4 · pith_short_8: 4FQ3M6ZN

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/4FQ3M6ZN2OBM7WJ4WY2ZJH4B6B \
  | 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: e161b67b2dd382cfd93cb635949f81f066894f5bc91cf564dee6ad1f7852dfba

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a7de8d8c6145adf93a84b0ba89862d6436086606b800898d34a3a4b38c5eecdb",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2013-03-07T09:30:10Z",
    "title_canon_sha256": "5d018b0f123039bcb1326f57b7081126fa570805744410c0df19728e762c9c93"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.1624",
    "kind": "arxiv",
    "version": 1
  }
}