Pith Number

pith:U5QMBH33

pith:2018:U5QMBH33G5BTAXZB7LRZSD4HMA

not attested not anchored not stored refs pending

Improved SVD-based Initialization for Nonnegative Matrix Factorization using Low-Rank Correction

Atif Muhammad Syed, Nicolas Gillis, Sameer Qazi

arxiv:1807.04020 v1 · 2018-07-11 · cs.NA · 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{U5QMBH33G5BTAXZB7LRZSD4HMA}

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	2026-05-17T23:52:59.055339Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a760c09f7b3743305f21fae3990f876029e858b67f882067d2fc6e990d1c055b

Aliases

arxiv: 1807.04020 · arxiv_version: 1807.04020v1 · doi: 10.48550/arxiv.1807.04020 · pith_short_12: U5QMBH33G5BT · pith_short_16: U5QMBH33G5BTAXZB · pith_short_8: U5QMBH33

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/U5QMBH33G5BTAXZB7LRZSD4HMA \
  | 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: a760c09f7b3743305f21fae3990f876029e858b67f882067d2fc6e990d1c055b

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "6a477627285fb50139a47f66c4ecf7723a793eb9e79b7049d39455d4fe5cac9c",
    "cross_cats_sorted": [
      "cs.LG",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.NA",
    "submitted_at": "2018-07-11T09:21:31Z",
    "title_canon_sha256": "82aba09a4dffaa65fbcd5687590006db778e4186f1b9bb8131f2ebc68cfb9ab7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1807.04020",
    "kind": "arxiv",
    "version": 1
  }
}