Pith Number

pith:NDPSEJDI

pith:2013:NDPSEJDIZM2LMFKF7UAEBA6SV6

not attested not anchored not stored refs pending

Block Coordinate Descent for Sparse NMF

Barak A. Pearlmutter, Jonathan Le Roux, Sergey M. Plis, Thomas P. Hayes, Vamsi K. Potluru, Vince D. Calhoun

arxiv:1301.3527 v2 · 2013-01-15 · cs.LG · cs.NA

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{NDPSEJDIZM2LMFKF7UAEBA6SV6}

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	2026-05-18T03:30:27.538828Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

68df222468cb34b61545fd004083d2af958a3a3739eb84b5b13cc3172fd3d4fb

Aliases

arxiv: 1301.3527 · arxiv_version: 1301.3527v2 · doi: 10.48550/arxiv.1301.3527 · pith_short_12: NDPSEJDIZM2L · pith_short_16: NDPSEJDIZM2LMFKF · pith_short_8: NDPSEJDI

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/NDPSEJDIZM2LMFKF7UAEBA6SV6 \
  | 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: 68df222468cb34b61545fd004083d2af958a3a3739eb84b5b13cc3172fd3d4fb

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c5296e335fafbd9c706a9e43c93fb2d246bb147d72c5ded9b051ab35ac347d61",
    "cross_cats_sorted": [
      "cs.NA"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2013-01-15T23:11:05Z",
    "title_canon_sha256": "33e6ed20bf46e64364ddd25fafd51d666473e7394737bff9b69fc92d37f9148d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.3527",
    "kind": "arxiv",
    "version": 2
  }
}