Pith Number

pith:KPY4AZWE

pith:2025:KPY4AZWEI6TJOR7W5UC42NFXUL

not attested not anchored not stored refs pending

A Fisher's exact test justification of the TF-IDF term-weighting scheme

Aitazaz A. Farooque, Paul Sheridan, Zeyad Ahmed

arxiv:2507.15742 v2 · 2025-07-21 · cs.CL · cs.IR · math.ST · stat.TH

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{KPY4AZWEI6TJOR7W5UC42NFXUL}

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	2026-07-05T11:45:37.888812Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

53f1c066c447a69747f6ed05cd34b7a2d9c64f2b749068937139a3475594a9f1

Aliases

arxiv: 2507.15742 · arxiv_version: 2507.15742v2 · doi: 10.48550/arxiv.2507.15742 · pith_short_12: KPY4AZWEI6TJ · pith_short_16: KPY4AZWEI6TJOR7W · pith_short_8: KPY4AZWE

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/KPY4AZWEI6TJOR7W5UC42NFXUL \
  | 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: 53f1c066c447a69747f6ed05cd34b7a2d9c64f2b749068937139a3475594a9f1

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b5ba2b214f8d44744f93037a85d6e3763d0cf585b263738fefbdd64cf2072234",
    "cross_cats_sorted": [
      "cs.IR",
      "math.ST",
      "stat.TH"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2025-07-21T15:54:23Z",
    "title_canon_sha256": "feebebe88bd229c6cde983afe8a35bb6f838ea714f1c0c4234062120c070889a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2507.15742",
    "kind": "arxiv",
    "version": 2
  }
}