Pith Number

pith:WSWQZOQB

pith:2023:WSWQZOQBVMRZA3JEJV4WAQQZCI

not attested not anchored not stored refs pending

On solving a rank regularized minimization problem via equivalent factorized column-sparse regularized models

Kim-Chuan Toh, Wei Bian, Wenjing Li

arxiv:2308.16690 v2 · 2023-08-31 · 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{WSWQZOQBVMRZA3JEJV4WAQQZCI}

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	2026-07-05T08:20:50.874866Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b4ad0cba01ab23906d244d7960421912215a0706964550435e075d2863945648

Aliases

arxiv: 2308.16690 · arxiv_version: 2308.16690v2 · doi: 10.48550/arxiv.2308.16690 · pith_short_12: WSWQZOQBVMRZ · pith_short_16: WSWQZOQBVMRZA3JE · pith_short_8: WSWQZOQB

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/WSWQZOQBVMRZA3JEJV4WAQQZCI \
  | 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: b4ad0cba01ab23906d244d7960421912215a0706964550435e075d2863945648

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "935db0cb58a6a950440811c4009cfd5408046581b1bc30ed1c181bf1f5200f0f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.OC",
    "submitted_at": "2023-08-31T12:50:19Z",
    "title_canon_sha256": "16efc7a98caa6cb525e300b8a840dbc9f601902013f3413289ca58a85af39e65"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2308.16690",
    "kind": "arxiv",
    "version": 2
  }
}