Pith Number

pith:OKPWWHQY

pith:2023:OKPWWHQY3Y5RKTEMLPPCTNR7A5

not attested not anchored not stored refs pending

$L_{2,1}$-Norm Regularized Quaternion Matrix Completion Using Sparse Representation and Quaternion QR Decomposition

Haojiang Li, Jifei Miao, Juan Han, Kit Ian Kou, Lizhi Liu

arxiv:2309.03764 v1 · 2023-09-07 · cs.CV · 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{OKPWWHQY3Y5RKTEMLPPCTNR7A5}

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	2026-07-05T06:48:41.945716Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

729f6b1e18de3b154c8c5bde29b63f074ce78c3a964046c5e152bd595fdbe560

Aliases

arxiv: 2309.03764 · arxiv_version: 2309.03764v1 · doi: 10.48550/arxiv.2309.03764 · pith_short_12: OKPWWHQY3Y5R · pith_short_16: OKPWWHQY3Y5RKTEM · pith_short_8: OKPWWHQY

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/OKPWWHQY3Y5RKTEMLPPCTNR7A5 \
  | 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: 729f6b1e18de3b154c8c5bde29b63f074ce78c3a964046c5e152bd595fdbe560

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "482036a9f42ae9923aaf99bb5868610c557ec8c91511bfd1a3c3d1fd7b1aea41",
    "cross_cats_sorted": [
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2023-09-07T15:08:12Z",
    "title_canon_sha256": "8639d479c5832b1b23071a257addf3afef7b00039c2e3fac545be926a4648f48"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2309.03764",
    "kind": "arxiv",
    "version": 1
  }
}