Pith Number

pith:RIY7VBXM

pith:2021:RIY7VBXMIHB7AJMSO6VLKN2TTL

not attested not anchored not stored refs pending

Stable and Compact Face Recognition via Unlabeled Data Driven Sparse Representation-Based Classification

Haolin Chen, Huan Wu, Licheng Jiao, Xiaohui Yang, Yiming Xu, Zheng Wang

arxiv:2111.02847 v1 · 2021-11-04 · 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{RIY7VBXMIHB7AJMSO6VLKN2TTL}

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	2026-07-05T03:29:09.799510Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

8a31fa86ec41c3f0259277aab537539acc754491a8b39f1b118d99245740d2ca

Aliases

arxiv: 2111.02847 · arxiv_version: 2111.02847v1 · doi: 10.48550/arxiv.2111.02847 · pith_short_12: RIY7VBXMIHB7 · pith_short_16: RIY7VBXMIHB7AJMS · pith_short_8: RIY7VBXM

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/RIY7VBXMIHB7AJMSO6VLKN2TTL \
  | 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: 8a31fa86ec41c3f0259277aab537539acc754491a8b39f1b118d99245740d2ca

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "ec3c415574a87b6b5e3cfde93b5eab5452a3637dd73488301c4ed01b3a218ff2",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2021-11-04T13:19:38Z",
    "title_canon_sha256": "3360cbd929e18f8f91c6e366d6a0bb89f704aa693a6ad38c81b9fc848dead474"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.02847",
    "kind": "arxiv",
    "version": 1
  }
}