Pith Number

pith:QJYX6KTM

pith:2026:QJYX6KTM2RJ52JG26USSH4RQ56

not attested not anchored not stored refs pending

A simple approach for biometrics: Finger-knuckle prints recognition based on a Sobel filter and similarity measures

Aristofanes C. Silva, Aura Conci, E. O. Rodrigues, T. M. Porcino

arxiv:2605.17673 v1 · 2026-05-17 · 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{QJYX6KTM2RJ52JG26USSH4RQ56}

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	2026-05-20T00:04:52.051738Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

82717f2a6cd453dd24daf52523f230efbc37484b0e0dac168522355f7b0ffc85

Aliases

arxiv: 2605.17673 · arxiv_version: 2605.17673v1 · doi: 10.48550/arxiv.2605.17673 · pith_short_12: QJYX6KTM2RJ5 · pith_short_16: QJYX6KTM2RJ52JG2 · pith_short_8: QJYX6KTM

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/QJYX6KTM2RJ52JG26USSH4RQ56 \
  | 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: 82717f2a6cd453dd24daf52523f230efbc37484b0e0dac168522355f7b0ffc85

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "556654ebb9f25ac45808ccca7f21b54c63ce7ffd5b1a709363f8f7b8fadfd19b",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2026-05-17T22:06:28Z",
    "title_canon_sha256": "9a5df84df49ea7bda6e8d2e9659a613290c82d8c273c15616958df3a1e3f326a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2605.17673",
    "kind": "arxiv",
    "version": 1
  }
}