Pith Number

pith:4ZWUAP7T

pith:2013:4ZWUAP7TK32ISG6FIGVLA344C3

not attested not anchored not stored refs pending

A Face Recognition approach based on entropy estimate of the nonlinear DCT features in the Logarithm Domain together with Kernel Entropy Component Analysis

Arindam Kar, Debotosh Bhattacharjee, Dipak Kumar Basu, Mahantapas Kundu, Mita Nasipuri

arxiv:1312.1520 v1 · 2013-12-05 · 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{4ZWUAP7TK32ISG6FIGVLA344C3}

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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	2026-05-18T01:37:44.899438Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e66d403ff356f4891bc541aab06f9c16e535cf1fd55ca85bfbe30f479d3153f1

Aliases

arxiv: 1312.1520 · arxiv_version: 1312.1520v1 · doi: 10.48550/arxiv.1312.1520 · pith_short_12: 4ZWUAP7TK32I · pith_short_16: 4ZWUAP7TK32ISG6F · pith_short_8: 4ZWUAP7T

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/4ZWUAP7TK32ISG6FIGVLA344C3 \
  | 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: e66d403ff356f4891bc541aab06f9c16e535cf1fd55ca85bfbe30f479d3153f1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "bc217e696b9dc31b09152866a6a8f876f8ef2dbc4a3e7e0f0e28f22e779d2d0d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2013-12-05T12:32:36Z",
    "title_canon_sha256": "24ccf39977523b4fb5bdd913d5bac3a003d83b95a24af81df8563f1ed2830ddd"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.1520",
    "kind": "arxiv",
    "version": 1
  }
}