Pith Number

pith:HLUVIRS2

pith:2012:HLUVIRS2CVXLA27AYHRFMD62XO

not attested not anchored not stored refs pending

Collaborative Representation based Classification for Face Recognition

David Zhang, Lei Zhang, Meng Yang, Xiangchu Feng, Yi Ma

arxiv:1204.2358 v2 · 2012-04-11 · 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{HLUVIRS2CVXLA27AYHRFMD62XO}

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	2026-05-18T02:56:52.256225Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ae954465a156eb06be0c1e2560fdabba905473f13e2ee2e930c56e2d73c4e00

Aliases

arxiv: 1204.2358 · arxiv_version: 1204.2358v2 · doi: 10.48550/arxiv.1204.2358 · pith_short_12: HLUVIRS2CVXL · pith_short_16: HLUVIRS2CVXLA27A · pith_short_8: HLUVIRS2

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/HLUVIRS2CVXLA27AYHRFMD62XO \
  | 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: 3ae954465a156eb06be0c1e2560fdabba905473f13e2ee2e930c56e2d73c4e00

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "261a1d156264cd995dbc5db55ccce6dfad352f0ee90226d2d5f43a6917fc2aad",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/3.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2012-04-11T07:13:20Z",
    "title_canon_sha256": "e4139f79ff8bede8d58e883367c741594db276d75c107f90a1a466cd5dca9f40"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2358",
    "kind": "arxiv",
    "version": 2
  }
}