Pith Number

pith:DO4EK7DV

pith:2014:DO4EK7DVOMSHKDLLNLHLBJMREP

not attested not anchored not stored refs pending

How Many Topics? Stability Analysis for Topic Models

Derek Greene, Derek O'Callaghan, P\'adraig Cunningham

arxiv:1404.4606 v3 · 2014-04-16 · cs.LG · cs.CL · 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{DO4EK7DVOMSHKDLLNLHLBJMREP}

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	2026-05-18T02:49:28.400640Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1bb8457c757324750d6b6aceb0a59123fa52ae77d235c44ad18aa1b6b99e4956

Aliases

arxiv: 1404.4606 · arxiv_version: 1404.4606v3 · doi: 10.48550/arxiv.1404.4606 · pith_short_12: DO4EK7DVOMSH · pith_short_16: DO4EK7DVOMSHKDLL · pith_short_8: DO4EK7DV

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/DO4EK7DVOMSHKDLLNLHLBJMREP \
  | 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: 1bb8457c757324750d6b6aceb0a59123fa52ae77d235c44ad18aa1b6b99e4956

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c605aa8c7ca23df6a770baef482ef71674a6b3bbaa5d7d65af2e9d0fadfb168d",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.IR"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.LG",
    "submitted_at": "2014-04-16T12:59:29Z",
    "title_canon_sha256": "80f4f72e61a255320f81802ff8a7bdab61ac5b05de4c33ad3ba0a98bafb15703"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.4606",
    "kind": "arxiv",
    "version": 3
  }
}