Pith Number

pith:BA54BUHN

pith:2022:BA54BUHNRDG3OQGEE2U2G6ES7G

not attested not anchored not stored refs pending

Quasi Non-Negative Quaternion Matrix Factorization with Application to Color Face Recognition

Changfeng Ma, Riwei Liao, Yajun Xie, Yifen Ke, Zhigang Jia

arxiv:2211.16739 v1 · 2022-11-30 · cs.CV · cs.NA · math.NA · math.OC

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{BA54BUHNRDG3OQGEE2U2G6ES7G}

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	2026-07-05T05:21:10.421851Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

083bc0d0ed88cdb740c426a9a37892f9ae25bc68a3a81c3a992bc779aa4c7bf0

Aliases

arxiv: 2211.16739 · arxiv_version: 2211.16739v1 · doi: 10.48550/arxiv.2211.16739 · pith_short_12: BA54BUHNRDG3 · pith_short_16: BA54BUHNRDG3OQGE · pith_short_8: BA54BUHN

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/BA54BUHNRDG3OQGEE2U2G6ES7G \
  | 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: 083bc0d0ed88cdb740c426a9a37892f9ae25bc68a3a81c3a992bc779aa4c7bf0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "be90fe00603ba9012485eb50bd3311159a83b2585ace7f290600004b642b6a61",
    "cross_cats_sorted": [
      "cs.NA",
      "math.NA",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2022-11-30T04:51:09Z",
    "title_canon_sha256": "ed917c77d38cfb1cfd897991d4ebc609f55f0d9da1cef98f2ab56c70766a39f5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2211.16739",
    "kind": "arxiv",
    "version": 1
  }
}