Pith Number

pith:O2J35YZX

pith:2021:O2J35YZXUHL4EFB4SIML7PLWFT

not attested not anchored not stored refs pending

Unsupervised Keyphrase Extraction by Jointly Modeling Local and Global Context

Mu Li, Shuangzhi Wu, Xinnian Liang, Zhoujun Li

arxiv:2109.07293 v1 · 2021-09-15 · cs.CL

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{O2J35YZXUHL4EFB4SIML7PLWFT}

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	2026-07-05T03:14:47.290176Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

7693bee337a1d7c2143c9218bfbd762cf3ae25e82c765458bc813ddc569d6b97

Aliases

arxiv: 2109.07293 · arxiv_version: 2109.07293v1 · doi: 10.48550/arxiv.2109.07293 · pith_short_12: O2J35YZXUHL4 · pith_short_16: O2J35YZXUHL4EFB4 · pith_short_8: O2J35YZX

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/O2J35YZXUHL4EFB4SIML7PLWFT \
  | 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: 7693bee337a1d7c2143c9218bfbd762cf3ae25e82c765458bc813ddc569d6b97

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d001f786b024c3e55423cf33b89cd8933d7592af422f4527fcfc1f4484d19c26",
    "cross_cats_sorted": [],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "cs.CL",
    "submitted_at": "2021-09-15T13:41:10Z",
    "title_canon_sha256": "bd79819369213796d814654bfca6e4d65df2faf21693dfcdc2f0d9eadd75dc50"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2109.07293",
    "kind": "arxiv",
    "version": 1
  }
}