Pith Number

pith:UEBM5KO4

pith:2026:UEBM5KO4PKD7OH4YR6P3TFU5D7

not attested not anchored not stored refs pending

Non--negative matrix factorization using the \textit{R} package \textsf{nnmf}

Michail Tsagris, Nikolas Kontemeniotis, Theodoros Perdikis, Volkan Sevin\c{c}

arxiv:2607.20084 v1 · 2026-07-22 · stat.ML · 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{UEBM5KO4PKD7OH4YR6P3TFU5D7}

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	2026-07-23T01:25:00.585082Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a102cea9dc7a87f71f988f9fb9969d1fe900429c58006068b888a0c638b619c6

Aliases

arxiv: 2607.20084 · arxiv_version: 2607.20084v1 · doi: 10.48550/arxiv.2607.20084 · pith_short_12: UEBM5KO4PKD7 · pith_short_16: UEBM5KO4PKD7OH4Y · pith_short_8: UEBM5KO4

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/UEBM5KO4PKD7OH4YR6P3TFU5D7 \
  | 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: a102cea9dc7a87f71f988f9fb9969d1fe900429c58006068b888a0c638b619c6

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7e8b471b78ec63dd76928a92c7524b337e3f8fda32cf620e78f579fd67aed461",
    "cross_cats_sorted": [
      "cs.LG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2026-07-22T12:35:52Z",
    "title_canon_sha256": "3c2dde77824d92b8e9cec126949c04c820833acd713762af5a6128dd1fb85c9d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2607.20084",
    "kind": "arxiv",
    "version": 1
  }
}