Pith Number

pith:WBAMIG7D

pith:2008:WBAMIG7D5ES5MH6JHDUZ73LQHF

not attested not anchored not stored refs pending

Text Modeling using Unsupervised Topic Models and Concept Hierarchies

Chaitanya Chemudugunta, Mark Steyvers, Padhraic Smyth

arxiv:0808.0973 v1 · 2008-08-07 · cs.AI · cs.IR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{WBAMIG7D5ES5MH6JHDUZ73LQHF}

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	2026-07-04T15:13:28.848567Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b040c41be3e925d61fc938e99fed703968c951dce78006503a68c4338fe677c7

Aliases

arxiv: 0808.0973 · arxiv_version: 0808.0973v1 · doi: 10.48550/arxiv.0808.0973 · pith_short_12: WBAMIG7D5ES5 · pith_short_16: WBAMIG7D5ES5MH6J · pith_short_8: WBAMIG7D

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/WBAMIG7D5ES5MH6JHDUZ73LQHF \
  | 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: b040c41be3e925d61fc938e99fed703968c951dce78006503a68c4338fe677c7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a1276006d3bf6de255a7c5f7924e3bd8ccf601741b6fc1b6c581e0dbe224f28f",
    "cross_cats_sorted": [
      "cs.IR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.AI",
    "submitted_at": "2008-08-07T07:59:29Z",
    "title_canon_sha256": "23e247c2d261dbed4cde9e047b8d2cbd89bd9694d0a40b1636074d0a8531e7b9"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0808.0973",
    "kind": "arxiv",
    "version": 1
  }
}