Pith Number

pith:H27NAZJS

pith:2012:H27NAZJSNUJ56FNGVE7DHL4V2L

not attested not anchored not stored refs pending

Robust Nonnegative Matrix Factorization via $L_1$ Norm Regularization

Baodi Liu, Bin Shen, Luo Si, Rongrong Ji

arxiv:1204.2311 v1 · 2012-04-11 · cs.LG · cs.CV · stat.ML

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{H27NAZJSNUJ56FNGVE7DHL4V2L}

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	2026-05-18T03:58:12.169388Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3ebed065326d13df15a6a93e33af95d2c496d584112a39f836407c15be7283c6

Aliases

arxiv: 1204.2311 · arxiv_version: 1204.2311v1 · doi: 10.48550/arxiv.1204.2311 · pith_short_12: H27NAZJSNUJ5 · pith_short_16: H27NAZJSNUJ56FNG · pith_short_8: H27NAZJS

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/H27NAZJSNUJ56FNGVE7DHL4V2L \
  | 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: 3ebed065326d13df15a6a93e33af95d2c496d584112a39f836407c15be7283c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2960842f9a3f710bfb69348f0de9e675b9ab6e8432599b64109e272b70dfb977",
    "cross_cats_sorted": [
      "cs.CV",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2012-04-11T01:03:03Z",
    "title_canon_sha256": "66ec9c941854d9ddee63c43c1929e2f351e6c58da6ea06e3a15ae422761527ce"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1204.2311",
    "kind": "arxiv",
    "version": 1
  }
}