Pith Number

pith:CBFIZN5H

pith:2011:CBFIZN5HBXU5EXPEUGTTBNVEMH

not attested not anchored not stored refs pending

On Estimation and Selection for Topic Models

Matthew A. Taddy

arxiv:1109.4518 v3 · 2011-09-21 · 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{CBFIZN5HBXU5EXPEUGTTBNVEMH}

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	2026-05-18T04:05:38.295584Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

104a8cb7a70de9d25de4a1a730b6a461ce57c0ac6a98cd56ba28cfe4c56af1d5

Aliases

arxiv: 1109.4518 · arxiv_version: 1109.4518v3 · doi: 10.48550/arxiv.1109.4518 · pith_short_12: CBFIZN5HBXU5 · pith_short_16: CBFIZN5HBXU5EXPE · pith_short_8: CBFIZN5H

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/CBFIZN5HBXU5EXPEUGTTBNVEMH \
  | 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: 104a8cb7a70de9d25de4a1a730b6a461ce57c0ac6a98cd56ba28cfe4c56af1d5

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3c8af122426f2a536bd52d7575997875c1449948d56e564b0ce6f66e94110600",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "stat.AP",
    "submitted_at": "2011-09-21T13:14:49Z",
    "title_canon_sha256": "af11edda3a98bf107e588781d359f946afef26eb5bc153b467116e3cb66e7aae"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1109.4518",
    "kind": "arxiv",
    "version": 3
  }
}