Pith Number

pith:JHLH2ODY

pith:2012:JHLH2ODYF6UYBMTJH45A6QDPRT

not attested not anchored not stored refs pending

A Practical Algorithm for Topic Modeling with Provable Guarantees

Ankur Moitra, David Mimno, David Sontag, Michael Zhu, Rong Ge, Sanjeev Arora, Yichen Wu, Yoni Halpern

arxiv:1212.4777 v1 · 2012-12-19 · cs.LG · cs.DS · 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{JHLH2ODYF6UYBMTJH45A6QDPRT}

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	2026-05-18T03:38:05.395197Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

49d67d38782fa980b2693f3a0f406f8ce707194345f10af51c27da38405deac0

Aliases

arxiv: 1212.4777 · arxiv_version: 1212.4777v1 · doi: 10.48550/arxiv.1212.4777 · pith_short_12: JHLH2ODYF6UY · pith_short_16: JHLH2ODYF6UYBMTJ · pith_short_8: JHLH2ODY

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/JHLH2ODYF6UYBMTJH45A6QDPRT \
  | 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: 49d67d38782fa980b2693f3a0f406f8ce707194345f10af51c27da38405deac0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f2a1a1ae11836dd111fcc29d45bb2e24ed590bf42c7f08f8d51d0a93db0ef930",
    "cross_cats_sorted": [
      "cs.DS",
      "stat.ML"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2012-12-19T18:14:51Z",
    "title_canon_sha256": "acd4993b59f200e326b5a34a9c10c9773cdf8868e7c5bd79927ba165b9f5933e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1212.4777",
    "kind": "arxiv",
    "version": 1
  }
}