Pith Number

pith:7QY6ZZDR

pith:2019:7QY6ZZDR5T2E2LKMLMZJTJ6LKE

not attested not anchored not stored refs pending

Minimum description length as an objective function for non-negative matrix factorization

Adam Prugel Bennett, Mahesan Niranjan, Steven Squires

arxiv:1902.01632 v1 · 2019-02-05 · cs.LG · 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{7QY6ZZDR5T2E2LKMLMZJTJ6LKE}

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	2026-05-17T23:54:47.112052Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fc31ece471ecf44d2d4c5b3299a7cb5122d1d2b694dbf24fe05fdf68b6bd3aee

Aliases

arxiv: 1902.01632 · arxiv_version: 1902.01632v1 · doi: 10.48550/arxiv.1902.01632 · pith_short_12: 7QY6ZZDR5T2E · pith_short_16: 7QY6ZZDR5T2E2LKM · pith_short_8: 7QY6ZZDR

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/7QY6ZZDR5T2E2LKMLMZJTJ6LKE \
  | 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: fc31ece471ecf44d2d4c5b3299a7cb5122d1d2b694dbf24fe05fdf68b6bd3aee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "799192b780b535c27b74bac175425ada7ce3128dbb1c20ad957ee6578cfd21a8",
    "cross_cats_sorted": [
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2019-02-05T10:25:14Z",
    "title_canon_sha256": "f31002cb6ab2df29a59bd7a5ff10c147282cce2aa34f686937a3b30da32ab5e2"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1902.01632",
    "kind": "arxiv",
    "version": 1
  }
}