Pith Number

pith:Y2AKGNY3

pith:2022:Y2AKGNY3HRLAIL7LFEB2NJNXNL

not attested not anchored not stored refs pending

Local Directional Gradient Pattern: A Local Descriptor for Face Recognition

Pavan Chakraborty, Satish Kumar Singh, Soumendu Chakraborty

arxiv:2201.01276 v1 · 2022-01-03 · cs.CV · cs.MM

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{Y2AKGNY3HRLAIL7LFEB2NJNXNL}

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	2026-07-05T03:45:59.347708Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c680a3371b3c56042feb2903a6a5b76ad7316e04d3e863050945d6b92fa237be

Aliases

arxiv: 2201.01276 · arxiv_version: 2201.01276v1 · doi: 10.48550/arxiv.2201.01276 · pith_short_12: Y2AKGNY3HRLA · pith_short_16: Y2AKGNY3HRLAIL7L · pith_short_8: Y2AKGNY3

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/Y2AKGNY3HRLAIL7LFEB2NJNXNL \
  | 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: c680a3371b3c56042feb2903a6a5b76ad7316e04d3e863050945d6b92fa237be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "24ec672647ddc3c83ef6d5b0d6a4f1f50f04b75eb50cbd0f023f9c9cd03f97d1",
    "cross_cats_sorted": [
      "cs.MM"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2022-01-03T08:34:25Z",
    "title_canon_sha256": "22b4b48b15782884a6fafed8f43647a56f7c184df92f14d82298edc347f998c7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2201.01276",
    "kind": "arxiv",
    "version": 1
  }
}