Pith Number

pith:MNI3V2QL

pith:2016:MNI3V2QLN7E37YQ7IP3G55QVBQ

not attested not anchored not stored refs pending

Quadratic Projection Based Feature Extraction with Its Application to Biometric Recognition

David Zhang, Hanzi Wang, Si Chen, Xiaochun Cao, Yan Yan

arxiv:1603.07797 v1 · 2016-03-25 · 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{MNI3V2QLN7E37YQ7IP3G55QVBQ}

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	2026-05-18T01:18:17.814392Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6351baea0b6fc9bfe21f43f66ef6150c0dde112ef811e0e52c762f4f2bbe3a37

Aliases

arxiv: 1603.07797 · arxiv_version: 1603.07797v1 · doi: 10.48550/arxiv.1603.07797 · pith_short_12: MNI3V2QLN7E3 · pith_short_16: MNI3V2QLN7E37YQ7 · pith_short_8: MNI3V2QL

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/MNI3V2QLN7E37YQ7IP3G55QVBQ \
  | 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: 6351baea0b6fc9bfe21f43f66ef6150c0dde112ef811e0e52c762f4f2bbe3a37

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "136c1aad1a34e6202155628f0d58c64ff54ca78bed4fa062974faff3ed90e83a",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2016-03-25T01:10:53Z",
    "title_canon_sha256": "1bb794f04ac29f850152c2e6727f9a444eb9de8395e76e6b794bd9a9eed8b5f2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.07797",
    "kind": "arxiv",
    "version": 1
  }
}