Pith Number

pith:4UJ7MRO6

pith:2022:4UJ7MRO65CFYWHIYYWXXJWIDTY

not attested not anchored not stored refs pending

Quaternion Optimized Model with Sparse Regularization for Color Image Recovery

Kit Ian Kou, Liqiao Yang, Yang Liu

arxiv:2204.08629 v1 · 2022-04-19 · cs.CV · eess.IV · 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{4UJ7MRO65CFYWHIYYWXXJWIDTY}

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	2026-07-05T04:15:32.313444Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e513f645dee88b8b1d18c5af74d9039e34e52ef66db9b4f82365fafdc8bb0392

Aliases

arxiv: 2204.08629 · arxiv_version: 2204.08629v1 · doi: 10.48550/arxiv.2204.08629 · pith_short_12: 4UJ7MRO65CFY · pith_short_16: 4UJ7MRO65CFYWHIY · pith_short_8: 4UJ7MRO6

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/4UJ7MRO65CFYWHIYYWXXJWIDTY \
  | 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: e513f645dee88b8b1d18c5af74d9039e34e52ef66db9b4f82365fafdc8bb0392

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "76f41c641e0f0b34d8124f577d6a353d3686c5d77b5104a53e73140ad46502db",
    "cross_cats_sorted": [
      "eess.IV",
      "math.OC"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CV",
    "submitted_at": "2022-04-19T03:07:12Z",
    "title_canon_sha256": "f76adfcac8313a821d53fc86f60c5ae127edbc87901049a5d8e1c363aef8e317"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2204.08629",
    "kind": "arxiv",
    "version": 1
  }
}