Pith Number

pith:LWZ5OF6Q

pith:2015:LWZ5OF6QJHINZ4LQJWZ4JWRZQM

not attested not anchored not stored refs pending

Large Enforced Sparse Non-Negative Matrix Factorization

Brendan Gavin, Jeremy Kepner, Vijay Gadepally

arxiv:1510.05237 v1 · 2015-10-18 · cs.LG · cs.NA · cs.SI

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{LWZ5OF6QJHINZ4LQJWZ4JWRZQM}

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	2026-05-18T01:09:39.973961Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

5db3d717d049d0dcf1704db3c4da398315c06b2e7d7fbb5586513046c5d3d6b1

Aliases

arxiv: 1510.05237 · arxiv_version: 1510.05237v1 · doi: 10.48550/arxiv.1510.05237 · pith_short_12: LWZ5OF6QJHIN · pith_short_16: LWZ5OF6QJHINZ4LQ · pith_short_8: LWZ5OF6Q

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/LWZ5OF6QJHINZ4LQJWZ4JWRZQM \
  | 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: 5db3d717d049d0dcf1704db3c4da398315c06b2e7d7fbb5586513046c5d3d6b1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "321029cb9ec7f81cf6f536b8e1b935218400064c7e90c5c123dcd0f1a507ed69",
    "cross_cats_sorted": [
      "cs.NA",
      "cs.SI"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2015-10-18T12:53:38Z",
    "title_canon_sha256": "c95e69ee3f8dbac99090f6341dcfbaff591344bb7008052ebdba8c867fcb8893"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1510.05237",
    "kind": "arxiv",
    "version": 1
  }
}