Pith Number

pith:QXT67EEB

pith:2015:QXT67EEBSK77HZLVLTGRBHHKFS

not attested not anchored not stored refs pending

Fast Clustering and Topic Modeling Based on Rank-2 Nonnegative Matrix Factorization

Barry Drake, Da Kuang, Haesun Park

arxiv:1509.01208 v3 · 2015-09-03 · cs.LG · cs.IR · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QXT67EEBSK77HZLVLTGRBHHKFS}

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	2026-05-18T01:31:13.361619Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

85e7ef908192bff3e5755ccd109cea2c8f612fcebd7f62ec2079f45ffe62e392

Aliases

arxiv: 1509.01208 · arxiv_version: 1509.01208v3 · doi: 10.48550/arxiv.1509.01208 · pith_short_12: QXT67EEBSK77 · pith_short_16: QXT67EEBSK77HZLV · pith_short_8: QXT67EEB

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/QXT67EEBSK77HZLVLTGRBHHKFS \
  | 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: 85e7ef908192bff3e5755ccd109cea2c8f612fcebd7f62ec2079f45ffe62e392

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "856317f0fbe8213116e6bb729e7170a4d60e1bab05642d25e50aba27b5acc3a4",
    "cross_cats_sorted": [
      "cs.IR",
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-09-03T18:55:28Z",
    "title_canon_sha256": "0c8191ece666634da97572c92287256a80740f57b401dea6c23286c30d376446"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.01208",
    "kind": "arxiv",
    "version": 3
  }
}