Pith Number

pith:4CBHPWMY

pith:2025:4CBHPWMYLKXKS3SOSSRMYWGPTS

not attested not anchored not stored refs pending

Comparison of Feature Learning Methods for Metadata Extraction from PDF Scholarly Documents

Cong Yang, Zeyd Boukhers

arxiv:2501.05082 v1 · 2025-01-09 · cs.IR · cs.CL · cs.DL · cs.LG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{4CBHPWMYLKXKS3SOSSRMYWGPTS}

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	2026-07-05T09:59:04.113473Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

e08277d9985aaea96e4e94a2cc58cf9cbff1917ea31f30ea9561cf18eb250699

Aliases

arxiv: 2501.05082 · arxiv_version: 2501.05082v1 · doi: 10.48550/arxiv.2501.05082 · pith_short_12: 4CBHPWMYLKXK · pith_short_16: 4CBHPWMYLKXKS3SO · pith_short_8: 4CBHPWMY

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/4CBHPWMYLKXKS3SOSSRMYWGPTS \
  | 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: e08277d9985aaea96e4e94a2cc58cf9cbff1917ea31f30ea9561cf18eb250699

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "0e52c309909ac8e3ae2611e9d075d2dcbcde4bd1910c738db79a0af8e599c84b",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.DL",
      "cs.LG"
    ],
    "license": "http://creativecommons.org/licenses/by-sa/4.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2025-01-09T09:03:43Z",
    "title_canon_sha256": "25db5009af866f66ebfa1018490e33201d14cb580edc673e827629c1963675d4"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2501.05082",
    "kind": "arxiv",
    "version": 1
  }
}