Pith Number

pith:E7WJYSSO

pith:2025:E7WJYSSOK4Q4ZBKCC7ODFRQCBV

not attested not anchored not stored refs pending

Constrained Non-negative Matrix Factorization for Guided Topic Modeling of Minority Topics

Jaakko Peltonen, Seyedeh Fatemeh Ebrahimi

arxiv:2505.16493 v1 · 2025-05-22 · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{E7WJYSSOK4Q4ZBKCC7ODFRQCBV}

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	2026-07-05T11:07:36.449901Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

27ec9c4a4e5721cc854217dc32c6020d7704c18d3b4122ea63a5973b7c051062

Aliases

arxiv: 2505.16493 · arxiv_version: 2505.16493v1 · doi: 10.48550/arxiv.2505.16493 · pith_short_12: E7WJYSSOK4Q4 · pith_short_16: E7WJYSSOK4Q4ZBKC · pith_short_8: E7WJYSSO

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/E7WJYSSOK4Q4ZBKCC7ODFRQCBV \
  | 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: 27ec9c4a4e5721cc854217dc32c6020d7704c18d3b4122ea63a5973b7c051062

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "eb0393d65080785318e23e09938a925a2dd33dabb8fa8ad263bf6b6916956ee4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2025-05-22T10:25:55Z",
    "title_canon_sha256": "5ef61cb3a524cab7cefda95f2b4040814a4c83b6be4fa0881a6b47dbbfb7230d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.16493",
    "kind": "arxiv",
    "version": 1
  }
}