Pith Number

pith:5QUBLQD3

pith:2021:5QUBLQD3SPNI4OAEOWYKSLZWVI

not attested not anchored not stored refs pending

Enhancing Keyphrase Extraction from Academic Articles with their Reference Information

Chengzhi Zhang, Lei Zhao, Mengyuan Zhao, Yingyi Zhang

arxiv:2111.14106 v2 · 2021-11-28 · cs.IR · cs.CL · cs.DL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{5QUBLQD3SPNI4OAEOWYKSLZWVI}

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	2026-07-05T03:36:19.226459Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ec2815c07b93da8e380475b0a92f36aa3cdcf8af35a4fb6ae09f77f50dd20a3d

Aliases

arxiv: 2111.14106 · arxiv_version: 2111.14106v2 · doi: 10.48550/arxiv.2111.14106 · pith_short_12: 5QUBLQD3SPNI · pith_short_16: 5QUBLQD3SPNI4OAE · pith_short_8: 5QUBLQD3

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/5QUBLQD3SPNI4OAEOWYKSLZWVI \
  | 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: ec2815c07b93da8e380475b0a92f36aa3cdcf8af35a4fb6ae09f77f50dd20a3d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7804ed630c8c80f0760c558367826f87b9a35bd95c229ac3a3d8913128c8a29d",
    "cross_cats_sorted": [
      "cs.CL",
      "cs.DL"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.IR",
    "submitted_at": "2021-11-28T11:14:16Z",
    "title_canon_sha256": "22551e6df67f454565b067dcc449512b48c9850e0bf0d15c70b369f0a81c9ee6"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2111.14106",
    "kind": "arxiv",
    "version": 2
  }
}