Pith Number

pith:XG655MLA

pith:2013:XG655MLADA2DIOD47RSN66JKCV

not attested not anchored not stored refs pending

Time-varying Learning and Content Analytics via Sparse Factor Analysis

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

arxiv:1312.5734 v1 · 2013-12-19 · 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{XG655MLADA2DIOD47RSN66JKCV}

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	2026-05-18T03:04:14.231880Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b9bddeb160183434387cfc64df792a1579b4475baa1b4e188af54ac25546355a

Aliases

arxiv: 1312.5734 · arxiv_version: 1312.5734v1 · doi: 10.48550/arxiv.1312.5734 · pith_short_12: XG655MLADA2D · pith_short_16: XG655MLADA2DIOD4 · pith_short_8: XG655MLA

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/XG655MLADA2DIOD47RSN66JKCV \
  | 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: b9bddeb160183434387cfc64df792a1579b4475baa1b4e188af54ac25546355a

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df872c610b48527c83399a7500107b12b4f0e441bc3efc4f74dcd2fb96d355f4",
    "cross_cats_sorted": [
      "cs.LG",
      "math.OC",
      "stat.AP"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.ML",
    "submitted_at": "2013-12-19T20:44:44Z",
    "title_canon_sha256": "1179572200813c214f92e719106c94d9decbdec0c34a5611bdc431b7f81ad0fe"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1312.5734",
    "kind": "arxiv",
    "version": 1
  }
}