Pith Number

pith:FGHQLA2K

pith:2013:FGHQLA2KTEMBJTZJWFQOPWS52N

not attested not anchored not stored refs pending

Sparse Factor Analysis for Learning and Content Analytics

Andrew E. Waters, Andrew S. Lan, Christoph Studer, Richard G. Baraniuk

arxiv:1303.5685 v2 · 2013-03-22 · stat.ML · cs.LG · math.OC · stat.AP

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{FGHQLA2KTEMBJTZJWFQOPWS52N}

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	2026-05-18T02:29:16.020301Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

298f05834a991814cf29b160e7da5dd347363b184f7ab55ae1f9a9248db8602d

Aliases

arxiv: 1303.5685 · arxiv_version: 1303.5685v2 · doi: 10.48550/arxiv.1303.5685 · pith_short_12: FGHQLA2KTEMB · pith_short_16: FGHQLA2KTEMBJTZJ · pith_short_8: FGHQLA2K

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/FGHQLA2KTEMBJTZJWFQOPWS52N \
  | 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: 298f05834a991814cf29b160e7da5dd347363b184f7ab55ae1f9a9248db8602d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "60b6a7b076954b19c16bf5e6f7aa0d85bf99bba4a6e01cea0566a206c429b988",
    "cross_cats_sorted": [
      "cs.LG",
      "math.OC",
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2013-03-22T18:44:56Z",
    "title_canon_sha256": "509a4b3ec1ac4f4995d91be4ae1d49f4260d8b57c3b3a1dec83c4d0df6beb85b"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1303.5685",
    "kind": "arxiv",
    "version": 2
  }
}